Merge pull request #368 from AppScale/testing

Merging 1.6.8 into master
Merge pull request #417 from AppScale/testing

bumped version number to 1.6.9
Merge pull request #431 from AppScale/testing

Fixes broken build script for numpy/matplotlib
removed mysql
removed mysql from appscale
Removed DIST which is already set in build.
Moved install_functions so it's called after $APPSCALE_HOME is defined.
Fix so that a 2nd install attempt on the same VM will succeed
colored status icons
Merge branch 'testing' of https://github.com/AppScale/appscale into ui
Using random ids for keys of entities on datastore tests and code cleanup.
Merge pull request #508 from AppScale/testing

AppScale 1.7.0 Release
Fixed a missing catch of concurrent exception handling on gets
tossing correct exceptions to fix app inventor
Merge pull request #509 from nlake44/trans-fix

Trans fix
Merge branch 'testing' of github.com:AppScale/appscale into apichecker-txn-error
moved cassandra to /opt so that we can mount ephemeral or persistent disks htere
moving zookeeper data to /opt so that we can mount ephemeral or persistent disks
Merge pull request #511 from shatterednirvana/move-data-directory

moved cassandra to /opt so that we can mount ephemeral or persistent disks
Merge remote-tracking branch 'org/testing' into move-zookeeper-data-location
Merge pull request #512 from shatterednirvana/move-zookeeper-data-location

Move zookeeper data location