remove compute_on_sites. allow only homogeneous set of assets
first pass
remove vulnerability model usage
fragility functions are not dictionary
removed taxonomy attribute from vulnerability function
removed taxonomy from asset
make vf pickable
refactored vf
Cosmetic changes
Forgotten cosmetic changes
Merged master
first pass
merge commit
fixed pep8
register for distributions
eps only returns vector
removed compute_on_assets
updated tests. removed unused and obsolete test
removed unused args site and asset_ref
distribution refactoring