Merge pull request #40 from jbosboom/mario

Mario fixes
Use Python from environment in #!

Always using /usr/bin/python is unsafe and non-portable.
Add gzip compression to PickleColumns
Merge remote-tracking branch 'upstream/master'

Conflicts:
	opentuner/search/manipulator.py
Merge pull request #41 from jrk/master

Compression for PickleColumns in the results database
Report correct search space sizes for PowerOfTwoParameter
Merge branch 'master' of github.com:jansel/opentuner
Add seed_configurations() method to MeasurementInterface
Add pypi packaging
decompress configs fetched from database (see 7c37af)
Pluggable representation

Currently the representation to use is hardcoded because I don't know
how to make an argparse option of class type.