IBInspectable flag added

Signed-off-by: Felix Gabel <felix.gabel@me.com>
General Group added

Signed-off-by: Felix Gabel <felix.gabel@me.com>
XUIDataSource added

Signed-off-by: Felix Gabel <felix.gabel@me.com>
Merge branch 'refs/heads/develop' into Swift

Signed-off-by: Felix Gabel <felix.gabel@me.com>

Conflicts:
	Source/UIView+XUIKit.h
	XUIKit.xcodeproj/project.pbxproj
UITextView+XUIKit extension added

Signed-off-by: Felix Gabel <felix.gabel@me.com>