Add tox.ini config for easy test running
Added a test for the distance to arc
Added a method called distance_to_semi_arc
Method is working, test passing, but still bugs
More improvements
More improvements
completed distance to segment - tests missing
Added tests for min_distance_from_segment
Small changes in comments
Small changes in comments
Additional tests for the getRX method
Changes related to code review
Fix the call of the min_distance_to_segment function in base.py
Merge pull request #224 from mmpagani/rx_investigation

Rx investigation
clip magnitude at 8.3
imt.from_string now returns a ValueError and can be used as a validator
added methods for calculating distances to volcanic front and subduction trench
implemented methods for subduction trench and volcanic front corrections
added GMPEs for North-East and South-West corrections and updated tests tables for total std (total std is computed with mean not-corrected)
Merge pull request #226 from gem/stats-only

imt.from_string now returns a ValueError and can be used as a validator