adding exclamation mark and question mark to delimiters, made text work the same as HTML Text
Merge branch 'FirstSentancePunctationFix' of git://github.com/dnadesign/silverstripe-framework into 3.1

* 'FirstSentancePunctationFix' of git://github.com/dnadesign/silverstripe-framework:
  adding exclamation mark and question mark to delimiters, made text work the same as HTML Text