Merge pull request #1000 from tweise/hds

move to contrib due to hbase dependency
Merge pull request #1001 from tweise/hds

file access as pluggable component to bucket manager
TFile implementation
Format the src
Add header
Merge pull request #1004 from siyuanh/hds

Add TFile HDSFileAccess implementation
Merge remote-tracking branch 'upstream/hds' into hds

Conflicts:
	contrib/src/test/java/com/datatorrent/contrib/hds/HDSTest.java