Added comment.
Moved the pre-compile header file.
Update comments.
Refactoring for warning.
Refactoring drawSelectedTextFragmentRectsFromIndex:toIndex:color:.
Rename, circumscribingRectForStringFromIndex:toIndex:.
Fixed auto layout warning.
Fixed compiler warning.
Documentation and change compiler warning setting.
Added comment.
Added comments.
Updated documents.
Merge branch 'feat-doxygen-documentation'