Use a choices for specifiying type of reporter
Version 0.6
Improved import logic to allow relative imports within specs
Exclude 'spec' package from installation.

This prevents some weird behavior when running
specs for another package because mamba will load
its own spec package since is first in the PYTHONPATH.
Merge pull request #31 from jaimegildesagredo/allow-relative-imports-in-spec

Improved import logic to allow relative imports within specs
Merge branch 'master' of github.com:nestorsalceda/mamba
Merge pull request #32 from aleasoluciones/master

Update travis build status icon to SVG