Updates for 4.1 version.
Prepared for 4.1 version release.
Merge branch 'develop'
Updated @NonNull and @Nullable annotations.
Merge branch 'develop'
Merge branch 'master' into release-support

Conflicts:
	artifacts/support-fragments-4.0.7-javadoc.jar
	artifacts/support-fragments-4.0.7-sources.jar
	artifacts/support-fragments-4.0.7.aar
Merged.
Updated resources.
Merge branch 'develop'
Merge branch 'master' into release-support

Conflicts:
	library/src/main/res/values/config.xml
Updates.
Updated gradle scripts.
Merge branch 'develop'
Merge branch 'master' into release-support

Conflicts:
	artifacts/support-fragments-4.1-javadoc.jar
	artifacts/support-fragments-4.1-sources.jar
	artifacts/support-fragments-4.1.aar