bundler/bundler — pull request #3320 by dholdren (2014-12-23 00:31:43+00:00)
Title: `bundle config --local gemfile /foo/bar/MyGemfile` now works

- `bundle config` can be used to set a custom gemfile name for a
project (specifying an absolute path)
- using other bundle commands will now search up parent directories
for a .bundle dir and use the gemfile specified in .bundle/config if
it is set
- does not require a file named 'Gemfile' to exist
- Revert "Correct bundle-config manpage"
This reverts commit 0a814573363d48f8cd860d672f1c935fe1d89fca.
- An added bonus: you can now both set and *delete* a global bundler
setting from *anywhere*: `bundle config --delete foo`

### Manual Test:
In an empty directory `/foo/bar/`:
`echo "source 'https://rubygems.org'" > MyGemfile`
`echo "gem 'rake'" >> MyGemfile`
`bundle config --local gemfile /foo/bar/FooGemfile`
`bundle install`
`bundle show` # Should show the rake gem
`mkdir spec && cd spec && bundle show` # Should also show the rake gem