v0.7.0-beta17

Changelog

• 0ddc0a8 Add cog train
• 31a5edf Add train hello world project
• e4f77b8 Add train mode to HTTP server
• 3f0ae82 Fix setting COG_WEIGHTS environment variable in tests
• b7d6f0c Include train in config label of built image
• 648441d Pass through config to create_app()
• 835cd48 Phony cog
• ac25ea0 Print error when setup fails
• 2ac7ef9 Read weights in setup()
• 8e6b620 Support functions as predictors
• 8b1799e Use Cog{File,Path}.validate
• 45efe8f Use an output object in the train fixture
• a099eb8 fix schema for setup_weights fixture