Nicer syntax for adding hooks.
Accept both modules and strings as hook options.
Merge pull request #12 from 3ofcoins/feature/hook-syntax

Nicer syntax for adding hooks.
Document `vendor push`
Update change log.
Bump version
Merge branch 'release/0.3.0' into develop
Fixture Gem source
Initial feature for tool call
Make it possible to pass a config block to Environment#initialize, it simplifies specs
Environment#[]
Avoid unnecessary reallocations
Make stubbed MiniGit expect .capturing
Don't double-push tags if one module name is another module name's prefix, `git push` complains
Merge branch 'develop' into feature/tools
Initial support for handling dependencies gathered by external tools.
Remove debug `require` statement.
Unignore and add test gems
Fix JRuby; remove now-dead code.
One more test for tool