Merge pull request GoogleCloudPlatform#68 from Carrotman42/master

Fix panic when the region is omitted

Merge pull request GoogleCloudPlatform#66 from ankushagarwal/master

Bug fix: Create the directory first and then check using os.IsNotExist

Merge pull request GoogleCloudPlatform#51 from SamiHiltunen/typo-fix

fix typo in refreshCfg

Merge pull request GoogleCloudPlatform#29 from Carrotman42/dockerfile

Add support for building a docker container in build.sh