Copy Go projects to the right directory

Fix #1124

Before this commit, Go projects were copied to
$GOPATH/owner_name/name/name.
Add retry to git clone
cd to the project directory for Go projects

Running tests from the $GOPATH has the side effect of running tests for
all third party libs that are downloaded into the $GOPATH as well.
Stub out bash in specs

The Sauce Connect addon runs bash, which makes the test hang for a
second or two.
Announcing go version & go env for Go projects
Using `go install` instead of `go build`

as the latter discards artifacts when multiple packages are specificed
without an `-o` flag, which is the case when passing `./...`.
Merge pull request #106 from meatballhat/go-announces-version-env

Announcing go version & go env for Go projects
Fold go env
Simplifying by doing both steps via `go get` per community feedback
Support more of the common makefile names
Merge pull request #108 from meatballhat/support-more-makefiles

Support more of the common makefile names
Attempting to make gvm a first-class citizen

with usage sticking pretty closely to how rvm works, for better or
worse.  There are some issues with how gvm's install command works, plus
invoking `gvm use` overwrites the GOPATH such that re-setting from
within the `setup` method is needed.  It's a step.
Folding the GVM module into the Go module per feedback
Merge remote-tracking branch 'upstream/master' into go-installs-with-go-install

Conflicts:
	spec/script/go_spec.rb
Removing now-unnecessary `|| true` from `gvm install`

now that upstream is fixed.  Also added a comment about why we're
prepending to $GOPATH.  All per feedback from @joshk.
Merge pull request #110 from modcloth-labs/gvm-citizenship

Attempting to make gvm a first-class citizen
Merge remote-tracking branch 'upstream/master' into go-installs-with-go-install

Conflicts:
	lib/travis/build/script/go.rb
	spec/script/go_spec.rb
make sure we add go to the front of choosen go versions
update gvm on each run for now
add a special rule for gvm install tip