adds wad script for travis caching on s3
adds `install bin/wad` to travis config, sets up s3 credentials
travis config spacing
changes bin/wad permissions
fixes region in travis wad config
adds env test_suite matrix branches
travis needs production gems (for pg)
fixes invalid travis yml file
Merge pull request #390 from G5/travis-caching-73512084

[WIP] Travis caching 73512084