Added support for calculators in commonlib
Added a deprecation facility for functions
Moved up a comment
Sphinx fix
Implementation of Strasser et al. (2010), magnitude scaling for subduction.
pep8 changes
Fixing error when building the documentation
Simplified a call to calc_hazard_curves
Merge pull request #258 from gem/classical-hazard

Added some utilities which are useful when implementing hazard calculators in commonlib
Merge pull request #261 from luisera/mag_scal

Magnitude scaling for subduction, Strasser et al. (2010)