added more tests for delete operation
added more tests for ApplyFormatOperation
added getSelection
fixed mergeElements
fixed ApplyFormatToElementOperation
fixed DeleteOperation
added style inheritance for paragraph splitting
Merge remote-tracking branch 'origin/master'

Conflicts:
	text/entity/ParagraphElement.js
	text/operation/DeleteOperation.js
removed getComputedStyle
added Composer
Merge remote-tracking branch 'origin/master'