Update tabbed interface

Deleted theme/mode editor files for tabbed interface part to test.
Deleted the unused minified folder. Add necessary autocomplete.js/css
files for tabbed interface.
Get rid of unused codes
updated tabbed interface

1. fixed the “scrollable editor” bug
2. adjust css of tabbed to make it look better
3. fixed the “make tabs thinner” bug
4. deleted some unused codes
Merge pull request #75 from xwang12/master

Updated tabbed interface- fixed issue #65 & #67