Add git local protocol support
Merge pull request #50 from pmorie/local

Add git local protocol support
Remove file lock
Merge pull request #51 from pmorie/lockl

Remove file lock
allow assemble/run scripts to be supplied in app source or via remote url
support save artifacts from remote url
support images that do not specify a user
enable the docker build/dockerfile based build paths
remove method build (dockerfile) path. remove image validation logic
update integration tests to work with external scripts