Add cheeky little comment to the Package Compiler

It clarifies something that tripped us up during our spike.
Check if the build is green in shipit rake task.
Handle the color 'red_anime' as well as 'red'.

If the job is red and building then the 'color' of the job will be
'red_anime' which was not matched before but should still be considered
red.
Move build check rake task to new bosh-dev gem