Muggler should attempt to use git root of project instead of local rake

[Jaym3s]

given a project structure like this:

some_rails_project/
-.git/
-Rakefile
-lib/
--engines/
---some_gem/
----Rakefile

& upstream changes to the Gemfile or migrations

When I

cd lib/engines/some_gem & git pull

Actual:

muggler uses the gem's Rakefile & no-ops due to no gem or relative db/migration changes

Expected:

muggler changes it's working directory (& rake scope) to that of the project root & runs pulled in migrations and gemfile changes.

Thoughts?

[Jaym3s]

also, first!