Replaced the usage of HttpComponent's Consts to Java's Charset
Removed empty and duplicate values from the strings files
Created a basic Gradle build for the Android app
Added test support to the Gradle build
Implemented the Gradle project structure
Added Gradle check as a Travis test
Added a Android setup to the Travis config
Added the Android support repository as a needed SDK tool
The Android Gradle build didn't add the Maven repository
Added a checkstyle check to the Gradle build

The checkstyle check will only warn about errors but won't let the
build fail.
Added support for the Limburgish and Frisian languages
Moved some untranslatable stuff like settings to a different values file
Merge commit '8173a0c' into feature/gradle-build

Conflicts:
	android/res/values-li/strings.xml
Merge commit '694d777' into feature/gradle-build
Merge commit 'a7659b5' into feature/gradle-build
Merge commit '5accd68' into feature/gradle-build
Merge commit 'de64a73' into feature/gradle-build
Merge commit '651ee63' into feature/gradle-build
Merge commit '060ad68' into feature/gradle-build
Merge commit 'e957bfe' into feature/gradle-build