Hot Master failover
update to master
fix formatting
remove unnecessary code
formatting
Formatting
merge master
formatting
Additional logging statements
Merge branch 'master' of https://github.com/amplab/tachyon into failover
merge master
Refactor some variable names, update descriptions
Restart edit log processor when a new image is found. Added multi edit log test.
Merge pull request #67 from calvinjia/failover

Failover
Fix journal test to init master info
Merge pull request #80 from calvinjia/failover

Fix journal test to init master info
Change logic for deleting logs. Completed logs are now deleted when they have been incorporated into the image. Therefore the current log will always be backed up during a failover but will not be during the first image write.
Merge pull request #81 from calvinjia/failover

Change logic for deleting logs.
format code
relocate the Utils into the package 'tachyon.util'
Merge branch 'amplab' into utils-fix