renamed mean_loss to average_loss
Merge pull request #39 from gem/aal-renaming

renamed mean_loss to average_loss
Merge pull request #41 from gem/smarter-risklib

Make the risklib able to read csv inputs
Merge branch 'master' of https://github.com/gem/oq-risklib into smarter-risklib
Added a test and a run_risk script
Introduced a separate risklite package