Add excluding functionality to the sync

To use this set the sync.excludes property in your application settings.
Remember that you cannot use this in conjunction with the includes property.
Use a new instance of SyncTask with every execution through the scheduler
Merge branch 'master' of github.com:brightinteractive/standby-dashboard

Conflicts:
	src/main/java/com/brightinteractive/standbydashboard/SyncTaskImpl.java