Fixed some bugs.
Seach text from tweets and highlight them.
Supported multiple highlights.
Added comments to setHighlightRanges:
Change property of _highlightRanges.
Merge branch 'feat-highlight' into develop
Add comments.
Remove an old property.
Removed old doc.
Changed build target path.
Add new document.
Change documentation target path.
Edit README.
Added a sample image.
Merge branch 'feat-documentation' into develop