Soft merge of uri branch
Clean up TachyonURI code
Address TODOs in TachyonURI
Merge pull request #384 from calvinjia/tachyon-14

[Tachyon-14] TachyonURI
tweak tachyonuri
combine user_getClientRawTableInfoByPath/ID; user_getFileBlocksByPath/Id
Merge branch 'master' of github.com:amplab/tachyon
revert '[TACHYON-83] Close stream and UnderFS in master image' to fix 'mvn clean install -Dtest.profile=hdfs'
code format
Merge branch 'master' into nrr2