added initial stages of multinest
added a small grid to play around with
started fitting API - T. Do
Merge remote-tracking branch 'upstream/pr/13' into multinest_fitter

Conflicts:
	specgrid/fitmultinest.py
started adding some tests and filling out structure of fitmultinest.py - T. Do
Merge pull request #16 from followthesheep/multinest_fitter

Multinest fitter