Added fileHandler for opening files in /data.
Added the blacklisting module.
Added the whitelisting module.
Changed some function names.
Lists are now copied to a simple-storage at addon installation.
Added the possibility to add custom entries in black/white lists.
Black/white lists are loaded from file at enabling. 
A new page-mod for blacklist is created every 500000 hosts.
Websites can be removed from black/white list.
Removed entries are stored in a simple storage.
Changed variable names in main.js.
Merge pull request #5 from gcornu/admin-interface

Admin interface
Ignore NetBeasns files
Fixed merge
Fixed tab/spaces.
Bug correction (salt was not a string)
Switch to changing tabs in settings with JS show/hide only (no exchanged messages)