removed outdated find method.
now db addon has a default database.
do not require pry.
fixed wrong local variable name.
now get_all can process nil souce_defs
fixed wrong method call for add_join
added test join.
fix grit sources rem
Merge pull request #6 from matthieu-foucault/fix

fix grit sources rem
separated grit bin and lib. fixed clean analyses.
added spec tests.
updated rspec and fixed tiny bugs discovered in the process.
removed useless test folder.
updated doc.
now grit is a gem.
added a spec for status. fixed a bug in the process.
fixed gemspec.
removed useless dependencies.
simplified rspec syntax.
now rspec use Grit module constants.