Fix bug when folder name is a number

Folder names are handled as indexes. 
This is a problems when a folder is named with an integer.
Merge pull request #12 from filp/master

Fix router (getAction/dispatch) to handle undefined actions
Add initial support for tree filtering
Code cleanup
Add visual cue for result tree navigation
Allow expanding folders in results
Cleanup code & comments
Sanitize query to prevent conflicts with :contains()
Fix search box sizing on Firefox
Auto focus search box on page load
Add visual cues for tree navigation globally
Add support for ESC key cancelling tree filter
Merge pull request #13 from filp/feature/simple-search

Search/filter tree by file and directory name
Merge pull request #11 from gorekee/patch-2

Fix bug when folder name is a number