sonar: final classes
refactoring: split method
fixed README encoding
issue 29 demo
fixed marker not shown when zoomed in/out to other region (issue 29)
added declusterification demo
updated version to 1.5.1, demo version 1.3
Merge branch 'release/1.5.1' into develop
callback for marker animation finish/cancel
sending onFinish and onCancel messages when animating Markers
fixed animation not canceling when interrupted (new animation, setting position, etc)
USER_DRAG -> DRAG_START
updated animation demo showing callback
Merge branch 'feature/marker_animation_improvements' into develop
DefaultClusterOptionsProvider stub
DefaultClusterOptionsProvider implementation
cluster circle shadow
default cluster better colors
support for default ClusterOptionsProvider if none set
separate colors from dimens