gh-8

Starting to shape the builds by params report.
gh-8

Working version of the "builds by params" report.
Trying to merge latest gh-8 changes.

I messed up repo sync.
Improved test coverage.
Improved tests.
Refactored some tests
Preparing to release version 0.4
Merge pull request #1 from mscata/master

Latest changes for release 0.4