Fix "\\." (Suffix / Outfix) for `j-help-voc-alist'
Add "!." (Fit / Customize) to `j-help-voc-alist'
Fix "\\:" (Grade Down / Sort Down) for `j-help-voc-alist'
Add &.: (Under) to `j-help-voc-alist'
Add "!" (Factorial / Out Of) to `j-help-voc-alist'
Add "\\:" (Grade Down/Sort) to `j-font-lock-len-2-verbs'
Merge pull request #10 from abo-abo/master

Updates to the J vocabulary lists.
 - Addition of Grade Down / Sort Down to font-lock and help doc
 - Proper regex for Suffix / Outfix
 - Addition of Factorial / Outof, Under, Fit / Customize to help doc