Merge pull request #60 from jinntrance/master

consolidated all the mount*.sh to mount.sh
code format and fix minor issues in mount.sh
fixed a issue that user could not run the script other than the TACHYON_HOME folder
Merge branch 'amplab'

Conflicts:
	bin/mount.sh
Merge pull request #63 from jinntrance/master

fixed a issue that user could not run the script mount.sh other than the TACHYON_HOME folder
formatting change
Merge pull request #62 from xiliu82/master

implement flush()
flush and seek
remove debugging info
graceful worker shutdown.
remove unused variable in MasterClient
changed the obsolete script invocation of  "restart-failed-workers.sh"
make both the temp folder and new blocks writable to the worker and the client
Merge branch 'amplab'
merge master branch
fix a deadlock
consolidate clear-cache, format, and gen
consolidate killall script
Added cat, count, lsr, tail, and touch to command line
Fix formatting