Added methods to pause, resume, and kill the events thread
Merge branch 'master' of https://github.com/matrix-org/matrix-android-sdk
Added more specific error callbacks converted from Retrofit's
Merge branch 'master' of https://github.com/matrix-org/matrix-android-sdk

Conflicts:
	app/src/main/java/org/matrix/matrixandroidsdk/LoginActivity.java
	app/src/main/java/org/matrix/matrixandroidsdk/RoomActivity.java
	app/src/main/java/org/matrix/matrixandroidsdk/fragments/MatrixMessagesFragment.java
	sdk/src/main/java/org/matrix/androidsdk/MXApiClient.java
	sdk/src/main/java/org/matrix/androidsdk/rest/client/RoomsApiClient.java
Merge branch 'master' of https://github.com/matrix-org/matrix-android-sdk