consolidate clear-cache, format, and gen
consolidate killall script
Added cat, count, lsr, tail, and touch to command line
Fix formatting
consolidate copy-dir.sh
use system.out directly
Close UnderFS when Master ends
Merge branch 'master' of https://github.com/amplab/tachyon
merge master
Merge pull request #66 from calvinjia/master

HDFS commands
format the code style, use the File.setPosixFIlePermissions to change file permissions
update license
format script
Code cleanup for UFS close
Merge pull request #68 from nicklan/master

Close UFS properly in EditLog
add license to all bash files
add licence for all java files
remove licence from auto-generated files
Merge pull request #69 from ooq/master

add apache license
Update scripts to integrate with system using variable override, similar
to hadoop.
Merge pull request #70 from timothysc/script_vars

Update scripts to integrate with system using variable override, similar to hadoop