bundle install: don't re-download specs for installed gems
move gemspec test to install/gemspec
move path, git, and gemspec tests to spec/gemfile/
how did the inject spec get over there
prereleases spec
path spec
pull out some group specs
gemspecs spec
bundler dependencies spec
binstubs spec
move invalid specs to gemfile and path specs
move --gemfile test to gemfile spec
Merge pull request #2680 from kickstarter/spec_refetch_cleanup

bundle install: don't re-download specs for installed gems
inline the one use of Fetcher.fetch
1.8.7 can't URI a URI
rubygems security and other version updates
avoiding warnings isn't worth potential exceptions

closes #2676, refs rubygems/rubygems#691
this file is general hax, move it to hax.rb
remove duplicate vendor test
better spec names