Renamed 'center' directive to 'ol-center', to avoid namespace collision
Renamed all sub-directives with the prefix "ol-". This affects every working code.
Merge branch 'events'

Conflicts:
	dist/angular-openlayers-directive.min.js
	examples/048-layers-static-image-example.html
changed to moveend event to sync the center
Constrain zoom example working again
Added an animation before setting the center
Added ImageWMS source layer
update example name
updated bad link on README
updated example