[Documentation] Fix broken links
updated CONTRIBUTORS file
[FLINK-834] Added DataSet.writeAsFormattedText()
Update release script (its the exact setup for creating the 0.6-incubating release)
Set version of poms to 0.7-incubating-SNAPSHOT ; 0.6-incubating release tasks:
- update _config.yaml of integrated documentation
- quick check on the quickstarts / build instructions to match the latest release
- quickstart.sh scrips now point to the correct versions.
[FLINK-993] Release builds and nightly builds now have the same names
Forgot license header (which causes apache-rat to fail the build)
[FLINK-1067] Replaced Stratosphere by Flink in FAQ
[FLINK-1068] Remove cdh4 specific build profile.

Users using CDH4 can now build Flink against Hadoop 2.0.0-alpha.
[FLINK-1074] Fix for NULL input tuples in ProjectJoin
[FLINK-1071] Add Map Partition to Plan dump JSON generator
[streaming] CoFlatMap & CoGroupReduce functionality
[streaming] Added database-backed state
[streaming] Memcached, MySQl and SQLite support for state management.
[streaming] Refactored db state connectors and added their license

Conflicts:
	flink-addons/flink-streaming/flink-streaming-connectors/pom.xml
[streaming] Refactored stream components with InputHandler & OutputHandler
[streaming] Minor bug and license header fixes
[streaming] Updated DBStates
[streaming] DataStream merge fix + example clean-up
[streaming] CoRecordReader and iterator added + ConnectedDataStream refactor