Config dialog has tabs for different features
Sharepoints is the default config tab
Backup tab is open if connection to signaling channel failed
Merge branch 'master' into issue_21__Backup_of_cache

Conflicts:
	platform/desktop/css/style.css
	platform/desktop/index.html
Merge branch 'master' into issue_21__Backup_of_cache

Conflicts:
	platform/desktop/index.html
Merge branch 'master' into issue_21__Backup_of_cache
Merge branch 'master' into issue_21__Backup_of_cache
Merge branch 'master' into issue_21__Backup_of_cache

Conflicts:
	platform/desktop/js/ui.js
Merge branch 'master' into issue_21__Backup_of_cache
Merge branch 'master' into issue_21__Backup_of_cache
Merge branch 'master' into issue_21__Backup_of_cache
Constructor of dialogConfig and set database on setPeersManager
Constructors for "config" and "about" dialogs
Converted tools menu on independent widget
Moved initialization of peers tabs to own class
Check if handshake is ready through PeersManager
Code re-sort
Fixed bugs
Fixed bug with update on peer tab
Added zip.js and zip-fs.js files and backup icon images