fix(build_release): Specify directory to build with GCB. (spinnaker#1852

)

fix(generate_bom): Replace removed config_file. (spinnaker#1811)

fix(validate): fixed location assumptions in tests. (spinnaker#1741)

This still doesnt work in general for aws, though
it does work with my paritcular setup. My intent
here was to be able to easily change the region,
but I still cannot do that. I think this is still
an improvement overall, though doesnt go as far as
I wanted.

feat(bom): Adds utility to reconstruct source from BOM. (spinnaker#1745)

fix(build): Include all subsystems in index. (spinnaker#1710) (spinna…

…ker#1711)

fix(changelog): Sanitize changelog and rename changelog post. (spinna…

…ker#1697)

fix(dev): Fixed halyard install in create_google_dev_vm and added upd…

…ates (spinnaker#1670)

feat(validate): add --test_stack (spinnaker#1672)

fix(generate_bom): Unconflate tarfile and profile paths. (spinnaker#1645

)

feat(halyard_release): Implement support for Halyard release tracks. (s…

…pinnaker#1599)