some actions added
wearable optimization
wearable api extended
sync issues fixed
added error handling for corewearable
some issues fixed
Merge branch 'ref' into xcore_2.0_dev

Conflicts:
	xcore-library/xcore/src/main/java/by/istin/android/xcore/Core.java
some improvements
updated build.gradle
Merge branch 'xcore_2.0' of https://github.com/IstiN/android_xcore into xcore_2.0

Conflicts:
	xcore-library/plugin_ab_pull_to_refresh/build.gradle
	xcore-library/xcore/build.gradle
Merge branch 'xcore_2.0_dev' of https://github.com/IstiN/android_xcore into xcore_2.0
dialog background fixed for L
added fragment view created interface
fixed NPE
theme updated
add overriding for listview to support sticky headers
optimized for compilation