Updated contributing section
Warn for SocketException (support info)
Update strings.xml
Move URI restrictions to content resolver

Advantages:
- better compatibility (for example com.motorola.blur.providers.contacts)
- no more searching for package names
Merge branch 'master' of github.com:M66B/XPrivacy
Merge pull request #1312 from justinliao7928/patch-1

Update strings.xml
Updated changelog
Remove raw contacts (unfinished)
Simplified restricting / allowing contacts
Added restriction for browser downloads
Updated read me