CODE-2746
CR of 1/3 or less always return 1/2
Fix design bug. CR is now internally being represented as Integer instead of Float, with fractional CRs being represented by negative values.

git-svn-id: svn+ssh://svn.code.sf.net/p/pcgen/code/Trunk@25450 ef53c05b-3124-4d59-ae7d-fe3273f42be7