changing include structure so tests can be parallelized
added rest of app tests for supported buildpacks. dropped support for grails since clearly broken
scoping issue
circleci debugging
simplify paths with assumptions
don't rm container on circleci
attempt at speeding up ci by caching cedarish
Compress slug when pigz is not installed

This adds a fallback to the "-z" option so that "slug.tgz" is still compressed
even when pigz is not installed.