* support source_urls ending with .git

* crew: clean up

* make sha256sum more readable

* change git_branch to git_tag and allow git hashes (thanks @satmandu)

* support git hashes

* support caching with git sources

* crew: fix compressdoc and fix creating tarball

* lib/const.rb: change envvar to CREW_IS_CACHING

* packages/dash.rb: fix homepage and binaries

* crew: remove (currently) extraneous variable long_verbose

* bin/crew: fix compressdoc

* packages/dash.rb: fix homepages (again)

* bin/crew: change $extract_dir to @extract_dir

* CREW_IS_CACHING => CREW_CACHE_ENABLED

* condense tag + hash checkout logic part 1

* condense tag + hash checkout logic part 2

* Bump version
Co-authored-by: satmandu <satadru@gmail.com>
Co-authored-by: satmandu <satadru@umich.edu>