Adding to hazardlib functions - 1st commit
Initial commit
Adds functionality to run PSHA calculation from toolkit
Clean up commented lines
Merge pull request #30 from g-weatherill/source_to_hazardlib

Adds lightweight PSHA calculator to hazardlib
More fixes to the plotting tools
Merge pull request #31 from g-weatherill/fixes_plotting_may14

More fixes to the plotting tools
Merge branch 'master' of github.com:GEMScienceTools/hmtk