[build] Updated to android Lollipop
Merge pull request #125 from jacek-marchwicki/fix-android-lollipop
[build] Added travistCI
Merge pull request #127 from jacek-marchwicki/travis-integration2
[core, layouts] Fix attributes confilict with other libs

Summary: We added twv prefix to all attributes, this
will fix an conflict with Google Play Services library
and possible other libraries that use same attributes.
Merge pull request #128 from jacek-marchwicki/fix-library-conflict2
[build] Use local gradle-mvn-push.gradle script
[core] Fix class name in log messages
[core, layouts] Move TwoWayView to the layouts library
[core, layouts] Handle notifyDataSetChanged() properly

Fixes #111
[core] Properly handle empty layout in getFirstVisiblePosition()
[core] Implement getLastVisiblePosition() in TwoWayLayoutManager
[layouts] Add getLastVisiblePosition() method to TwoWayView
[layouts] Use BaseLayoutManager.isVertical() in Lanes
[layouts] Factor out lane size calculation in Lanes
Merge remote-tracking branch 'upstream/master'

Conflicts:
	core/build.gradle
	core/src/main/java/org/lucasr/twowayview/ItemClickSupport.java
	core/src/main/java/org/lucasr/twowayview/ItemSelectionSupport.java
	core/src/main/res/values/attrs.xml
	core/src/main/res/values/ids.xml
	layouts/build.gradle
	layouts/src/main/java/org/lucasr/twowayview/widget/BaseLayoutManager.java
	layouts/src/main/java/org/lucasr/twowayview/widget/DividerItemDecoration.java
	layouts/src/main/java/org/lucasr/twowayview/widget/GridLayoutManager.java
	layouts/src/main/java/org/lucasr/twowayview/widget/Lanes.java
	layouts/src/main/java/org/lucasr/twowayview/widget/SpacingItemDecoration.java
	layouts/src/main/java/org/lucasr/twowayview/widget/SpannableGridLayoutManager.java
	layouts/src/main/java/org/lucasr/twowayview/widget/StaggeredGridLayoutManager.java
	layouts/src/main/java/org/lucasr/twowayview/widget/TwoWayView.java
	layouts/src/main/res/values/attrs.xml
	sample/build.gradle
	sample/src/main/AndroidManifest.xml
	sample/src/main/java/org/lucasr/twowayview/sample/LayoutAdapter.java
	sample/src/main/java/org/lucasr/twowayview/sample/LayoutFragment.java
	sample/src/main/res/layout/layout_grid.xml
	sample/src/main/res/layout/layout_list.xml
	sample/src/main/res/layout/layout_spannable_grid.xml
	sample/src/main/res/layout/layout_staggered_grid.xml