Merge pull request #1 from jhovgaard/master

IStorageProvider support, settings window + minor UI changes
Merge pull request #4 from jhovgaard/master

Updated AmazonS3StorageProvider to use new User Settings
Prevent exception when hotkey is already registered
Handles exception if no provider selected
UI update to settings window
Merge branch 'master' into dropbox

Conflicts:
	src/GoShareIt.Application/SettingsWindow.xaml
	src/GoShareIt.Application/SettingsWindow.xaml.cs