Merge pull request #142 from processnotproduct/master

Fixed issue #136, Fixed line number alignment diff between default/light <-> dark.
Merge pull request #143 from processnotproduct/master

UI and Bug fixes.
Add check, used in light theme to the bundle.
Remove the icon from the app title.
Add CodeMirror as a subproject.
Remove some debug output.
Drag and drop the tabs in the left menu.

Close #39.
Get writable entries for files opened from File Manager.
Remove direct calls to EditSession from outside editor.js.
Fix launching files via chrome.app.runtime.onLaunched.
Rename Editor to EditorAce.
Basic support for CodeMirror.
Rename main object from TextDrive to TextApp.
Make CodeMirror work (partly).
Use all the available space for the editor.
Make search work on CodeMirror.
Implement change event and getting contents of CodeMirror tab.
Open existing files with CodeMirror.
Bind undo/redo in CM.
Remove unneeded functions increase/decreaseFontSize.
Fix misprint.