Merge pull request #136 from prongs/protobuf

Optimization. Avoid creating new instance on each command.
Merge pull request #138 from prongs/protobuf

lens-ctl should refer lens-config.sh instead of grill-config.sh
Config renames from grill.* to lens.*
Fix conf rename misses
fix rename issues
Fix jdbc client url
Fix server url from client
Merge pull request #139 from InMobi/rename

Rename config from grill.* to lens.*
Merge branch 'develop' of github.com:InMobi/grill into protobuf

Conflicts:
	lens-server-api/src/main/java/org/apache/lens/server/api/GrillConfConstants.java
	lens-server/src/main/java/org/apache/lens/server/query/GrillServerDAO.java
	lens-server/src/main/java/org/apache/lens/server/user/DatabaseUserConfigLoader.java
	lens-server/src/main/resources/lensserver-default.xml