Use edge combustion and move things from development to test.
Ignore the sqlite databases.
Test all Rails configurations 3.0 -> 4.0
Swap stabby proc out for the actual word one.
Update travis config.

* Remove Ruby 1.9.2
* exclude must be nested under matrix
Test against Ruby 2.0 too.
Merge pull request #24 from parndt/combustion

Full testing support with Combustion