Add comments to package tachyon.client

Add comments to package tachyon.client. For more detailed JavaDoc.
fix tests
Merge pull request #253 from PasaLab/comment-client

Add comments to package tachyon.client
fix a few comments, and format the code
improve the doc
rename checkpointPath to ufsPath
fix TFsShell unit tests.
improve ufs api. make unit test more stable.
add glusterfs conf to the website
commit the missing md file
Add final modifier for private member of MasterInfo to reduce mutability and unfortunate assignment.
Merge pull request #257 from hsaputra/update_on_masterinfo_1

Add final modifier for private member of MasterInfo class
seperate glusterfs to a standalone profile.
update glusterfs related doc
Abstract Test Profiles
add more TachyonURI unit tests
Add comments and format the code

Add comments to package tachyon.worker and format the code.
Merge pull request #263 from PasaLab/comment-worker

Add comments to package tachyon.worker
minor tweak tachyon.worker package
better loging to jenkins