Make underFS configurable
Fixed CommonUtils cleanPath

It throws an InvalidPathException and can be called in other code now.
Small cleanups to MasterInfo

Added some comments and cleaned up a couple things
Alphabetized methods and added note to docs
Merge pull request #176 from manugoyal/clean-path

Fixed CommonUtils cleanPath
Merge pull request #177 from manugoyal/masterinfo-comments

Small cleanups to MasterInfo
Refactored InodeFolder to store children Inodes rather than ids

This simplifies many operations
Commented InodeFolder and cleaned up MasterInfo
Fixed docs and naming in InodeFolder
Small fixes to InodeFolder
Improved comments and a parameter name
Removed unnecessary addToFileIdPinList method
Merge pull request #178 from manugoyal/inode-folder-change

Refactored InodeFolder to store children Inodes rather than ids
fixes
Merge branch 'master' of github.com:amplab/tachyon
fix tests, format
fix unit tests
Added addToFileIdPinList method to loadImage

It was previously in writeImage erroneously.
Merge pull request #179 from manugoyal/add-pin-list

Added addToFileIdPinList method to loadImage
API modification for configurable ufs