To cache IOException when isTryCache
Reformat lines according to code conventions
mount_ramfs_linux warns if requested size>freemem
Use total mem size, and don't start if mount fails
Use proper def for GB,MB,KB and reuse code for mac
Merge pull request #86 from nicklan/fix-mount

mount_ramfs_linux warns if requested size>freemem
several fixes in mount
two api impls
To handle the underfs checkpoint before the caching stuff
Modify the var name from mWrittenBytes to mCachedBytes
Merge pull request #85 from GraceH/trycachefailure

Save checkpoint onto UnderFS W/O a local worker
make file creation and deletion sychronized
Merge pull request #93 from GraceH/editlog-sync

Make file creation and deletion sychronized
code clean. add more comments.
replace run_on_slaves with $bin/tachyon-slaves.sh
Merge pull request #95 from GraceH/runslaves

Replace run_on_slaves with $bin/tachyon-slaves.sh
best test logging and format
Format is required before starting the cluster
Delete all loaded completedLog during rebooting
Fix OutOfBound exception in swapoutOrphanBlocks