Prescription generates now correct checksum for a given presription
Print description with italics in headers for comments and interactions
Merge branch 'master' of https://github.com/ngiger/oddb.org
Add optionnal second argument when creating EphaInteractionPlugin
Removed substrates, hayes, cyp450. Corrected some test
Corrections to unit tests
Avoid nil access in prescription view
Fix watir spec for deleting first medicament.