Career and species can only be chosen on character create and never be altered.
Merge branch 'feature-race-and-career-on-create-only' into develop
New data model for storing and calculation experience usage.
Just a single method for deleting all characters and their data.
Cleaning out some misuses of unless nil? and making sure that skills can not be trained until free ranks from career and specialization have been chosen.
Registering experience used buying specializations.
Adding class to experience box when gone over allowance.
Now using icons from zurb
Experience and credits can now always be updated and experience values in PDF are now correct.
Ssolved an issue showing success notices.
Merge branch 'develop'