used to: by running scripts on cards and comparing to string value of selected group
now: by keeping a list of group_ids for all cards, and comparing indices
Added 'bin size' attribute for making a histogram of numeric axes.
Added 'Text length' statistic.
git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@1071 0fc631ac-6414-0410-93d0-97cfa31319b6
twanvl
