created gnip submodule
versioning in streams-contrib
Merge branch 'trunk' of https://github.com/w2ogroup/streams into trunk

Conflicts:
	streams-mappings/pom.xml
	streams-mappings/src/main/java/com/gnip/api/GnipActivityFixer.java
	streams-mappings/src/test/java/com/gnip/api/test/FacebookEDCAsActivityTest.java
	streams-mappings/src/test/java/com/gnip/api/test/FlickrEDCAsActivityTest.java
	streams-mappings/src/test/java/com/gnip/api/test/YoutubeEDCAsActivityTest.java
modified generated source package names and clean plugin config
modified generated source package names and clean plugin config
Merge branch 'trunk' of https://github.com/w2ogroup/streams into trunk