bump to version 1.2.8
travis CI deployment by tags
Merge pull request #133 from peterbe/travis-ci-deployment-by-tags

travis CI deployment by tags
bumping to version 1.2.9 (to test travis deployment)
adding a travis link in the README
Only deploy on master branch
add support for modules as value sources
Merge pull request #124 from twobraids/for-modules-august2014

add the ability for modules to be used as value/overlay sources
fixed 'Usage' to be on 1 line
fixed import of inspect