Feedback button animation.
Basic visualization of state feedback from readers for editors
Try non-sudo version, use sudo only if that fails
Add TarFileReadInput widget and improve tar exploration.
Add TarFileReadInputWithHints widget and FileReadInputWithHints widget. Improve the tar exploration.
Add additional tests for tar rules. Fix bad styled code in tar widget.
Update the number of total tests. Allow '_' in widget parameter name.
Merge branch 'master' of https://code.google.com/p/oppia
Create a safe RTE component directive. Add RTE functionality using jWysiwyg to the rule feedback editor.
Merge https://code.google.com/p/oppia

Conflicts:
	data/explorations/tar.yaml
	extensions/rules/tar_file_string.py
	extensions/rules/tar_file_string_test.py
	extensions/widgets/interactive/FileReadInputWithHints/FileReadInputWithHints.html
	extensions/widgets/interactive/FileReadInputWithHints/FileReadInputWithHints.py
	extensions/widgets/interactive/FileReadInputWithHints/static/js/FileReadInputWithHints.js
Remove unwanted files.