Fixed newlines in printing.

Change-Id: 41dc6f51c0
Story-Id: 79337172
Refactor the repository structure

Drop the part of the code base written in Bash, it is no longer needed.
The git-trunk directory becomes the top level directory, making the whole thing
nicely go-gettable as github.com/salsita/salsaflow.

Also renamed bin/hooks/commit-msg to bin/hooks/salsaflow-commit-msg so that it
can be installed as salsaflow-commit-msg executable directly.

Change-Id: 808d84ce8f
Makefile: Update to reflect the new paths, cleanup

The system-wide install target was actually not that useful, so the install
target that was left in the Makefile just installs the executables into the
project workspace.

The update-deps target was updates to include all 3rd-party packages that are
being used right now. It is handly for development purposes since just running
go get ./... modifies the project repository, which is not always desired.

Change-Id: 380fff8dc8