Fix typos and words in Readme

README.md

@@ -1,12 +1,12 @@
 ## Delta Chat Android Client
 
-This is the android client for [Delta Chat](https://delta.chat/).
+This is the Android client for [Delta Chat](https://delta.chat/).
 It is available on [F-Droid](https://f-droid.org/app/com.b44t.messenger) and
 the [Google Play Store](https://play.google.com/store/apps/details?id=chat.delta).
-The APK can also be downloaded from [github](https://github.com/deltachat/deltachat-android/releases)
-(for experienced users only). 
+The APK can also be downloaded from [GitHub](https://github.com/deltachat/deltachat-android/releases)
+(only for experienced users).
 
-For the core library and other common information, please refer to the
+For the core library and other common info, please refer to the
 [Delta Chat Core Library](https://github.com/deltachat/deltachat-core).
 
 <img alt="Screenshot Chat List" src="docs/images/2019-01-chatlist.png" width="298" /> <img alt="Screenshot Chat View" src="docs/images/2019-01-chat.png" width="298" />
@@ -22,53 +22,53 @@ subproject _deltachat-core_:
   or later by `git submodule update --init --recursive`. If you do this in your
   home directory, this results in the folder `~/deltachat-android` which is just fine.
 
-- Alternatively, you can download the [deltachat-android zip-file](https://github.com/deltachat/deltachat-android/archive/master.zip); in this case, also download the [deltachat-core zip-file](https://github.com/deltachat/deltachat-core/archive/master.zip) and place its contents to `jni/messenger-backend`
+- Alternatively, you can download the [deltachat-android zip-file](https://github.com/deltachat/deltachat-android/archive/master.zip); in this case, also download the [deltachat-core zip-file](https://github.com/deltachat/deltachat-core/archive/master.zip) and place its contents to `jni/messenger-backend`.
 
-Then, call `ndk-build` in the root directory to build the C-part; 
-this also builds deltachat-core.  Afterwards run the project in Android Studio.
+Then, call `ndk-build` in the root directory to build the C-part;
+this also builds deltachat-core. Afterwards run the project in Android Studio.
 The project requires API 25.
 
-With chance, that's it :) - if not, read on how to setup a proper development
+With chance, that's it :) - if not, read on how to set up a proper development
 environment.
 
 
 # Install Development Environment
 
-1. Some libs required by Android Studio may be missing on 64 bit Linux machines 
-   [[Source](https://developer.android.com/studio/install.html)], so for Ubuntu execute  
-   `$ sudo apt-get install libc6:i386 libncurses5:i386 libstdc++6:i386 lib32z1 libbz2-1.0:i386`  
-   and for Fedora execute  
-   `$ sudo yum install zlib.i686 ncurses-libs.i686 bzip2-libs.i686`
-  
-2. Download Android Studio from <https://developer.android.com> (android-studio-ide-...-linux.zip)
-   and unpack the archive which contains a single folder called `android-studio`; 
-   move this folder eg. to `~/android-studio` 
+1. Some libs required by Android Studio may be missing on 64 bit Linux machines
+   [[Source](https://developer.android.com/studio/install.html)], so for Ubuntu execute
+   `$ sudo apt-get install libc6:i386 libncurses5:i386 libstdc++6:i386 lib32z1 libbz2-1.0:i386`
+   and for Fedora execute
+   `$ sudo yum install zlib.i686 ncurses-libs.i686 bzip2-libs.i686`.
 
-3. To launch Android Studio for the first time, open a terminal, navigate to 
-   `~/android-studio/bin`, execute `./studio.sh` and use all standard values
+2. Download Android Studio from <https://developer.android.com> (android-studio-ide-...-linux.zip)
+   and unpack the archive which contains a single folder called `android-studio`;
+   move this folder e.g. to `~/android-studio`.
+
+3. To launch Android Studio for the first time, open a terminal, navigate to
+   `~/android-studio/bin`, execute `./studio.sh` and use all the standard values
    from the wizard.
-   
-4. Android Studio now ask you if you want to download an existing project; 
+
+4. Android Studio now asks you if you want to download an existing project;
    choose `~/deltachat-android` as created in the "Build" chapter (Android Studio starts to
    build the project, however, there are some steps missing before this will
    succeed).
-   
+
 5. As Delta Chat uses API 25 for some reasons, click on the corresponding error
    message and install "Nougat 7.1.1 (API 25)" and the "Build-Tools" (you should
    also find the option at "Tools / Android / SDK Manager / SDK Platforms").
    Now the build should succeed - but the app still misses the native part.
 
-6. Download Android NDK Revision 14b from
+6. Agree to the terms and download Android NDK Revision 14b from
    [NDK Archives](https://developer.android.com/ndk/downloads/older_releases)
    (Newer releases shall not be used currently, they are not compatible,
-   see issues #197, #220, #248) and unzip the archive which contains a single folder
-   called `android-ndk-r...`; move this folder eg. to `~/android-ndk-r...`
-   
+   see issues #197, #220, #248) and extract the archive containing a single folder
+   called `android-ndk-r…`; move this folder e.g. to `~/android-ndk-r…`.
+
 7. Export the folder path to your environment as ANDROID_NDK and add it to PATH.
-   You can archive this eg. by adding the following lines to `.bashrc`  
-   `export ANDROID_NDK=/home/bpetersen/android-ndk-r...`  
-   `export PATH=$PATH:$ANDROID_NDK`
-   
+   You can archive this e.g. by adding the following lines to `.bashrc`
+   `export ANDROID_NDK=/home/bpetersen/android-ndk-r…`
+   `export PATH=$PATH:$ANDROID_NDK`.
+
 The last two steps may be omitted by using the new Android Studio NDK options,
 however, thus far, we have not found the time to do so.
 
@@ -80,6 +80,6 @@ The user interface classes are based on the Signal messenger.
 
 # License
 
-Licensed under the GPLv3, see LICENSE file for details.
+Licensed GPLv3+, see the LICENSE file for details.
 
-Copyright © 2017-2019 Delta Chat contributors
+Copyright © 2017-2019 Delta Chat contributors.