Fix #784
Fix test/input/drewr3.dat
Bump version date to 20130523.  3.0 Release Candidate
Make acprep use "str.split" not "string.split"

Python is displeased with acprep if a *FLAGS environment variable is
set. This patch converts the problematic "string.split" statement to
instead be "str.split", which appears to fix the problem.
Merge pull request #189 from Travis-Snoozy/master

Make acprep use "str.split" not "string.split"
Merge commit '900af573319c3787854abc5653c8133d37eb013f'