adding a way to add additional RUN commands in a docker file, or to
specify the CMD.
fixing tests after changes in 1c7f086
fixing tests and ordering of putting stuff in dockerfile.
adding test for adding additional RUN commands.
adding test for adding additional RUN commands.
Merge branch 'additional-docker-commands' of github.com:Banno/banno-sbt-plugin into additional-docker-commands

Conflicts:
	src/sbt-test/banno-sbt-plugin/docker/build.sbt
fixing additionalRunCommands to accept multi part commands.
adding another assert so that arguments passed into `docker run` are the
arguments used.
renaming entryPointArguments to defaultCommand
fixing docker test compile
change defaultCommand to just be a string, and split it on spaces
later.
Merge pull request #47 from Banno/additional-docker-commands

Additional docker commands