Squashed commit of the following:

commit 2dfb2fc64afbb56cc6d3be274981e5cc1f5b37af
Author: Joel Goguen <jgoguen@jgoguen.ca>
Date:   Tue Sep 18 09:04:07 2012 -0300

    Make the unit test ever so slightly more useful by actually checking all return values and using the proper regex for case-insensitive non-capturing group

commit cbd22f8a3d976df590ceb8743ed7e01891ece985
Author: Joel Goguen <jgoguen@jgoguen.ca>
Date:   Mon Sep 17 10:10:33 2012 -0300

    Add a test to validate using the regex ?i modifier

commit a074ec9eb84057907806bd5fb991d10e39fc402f
Author: Joel Goguen <jgoguen@jgoguen.ca>
Date:   Mon Sep 17 08:28:39 2012 -0300

    Use case-sensitive matching. Modify unit test to validate that case matters.

commit 84d76f9f0b42ac6f6ede7744e011b2fa9af598e9
Author: Joel Goguen <jgoguen@jgoguen.ca>
Date:   Thu Sep 13 11:14:04 2012 -0300

    Adding a note that the matching is case-insensitive

commit 951af91e3741ef7d204501daccae2a0589c65edc
Author: Joel Goguen <jgoguen@jgoguen.ca>
Date:   Fri Sep 7 11:22:01 2012 -0300

    Adding configure check for libpcre, compliments of bnoordhuis

commit e11e621fbd3b9a8d2f933e24f856eff669f71b4b
Author: Joel Goguen <jgoguen@jgoguen.ca>
Date:   Fri Sep 7 10:19:02 2012 -0300

    Removing unneeded parens around function pointer call

commit be0783a36a97e6ec0859803a120daefa9bf78469
Author: Joel Goguen <jgoguen@jgoguen.ca>
Date:   Fri Sep 7 09:50:47 2012 -0300

    Fixing style issues

commit af2a82b45110fcb0e03853e8b79f100a94ae6060
Author: Joel Goguen <jgoguen@jgoguen.ca>
Date:   Fri Aug 24 22:24:58 2012 -0300

    Update README files to note libpcre dependency and the second form of "Require cas-attribute".

commit f2bdf899ea841e2c18eb7efd7d18044ddd557d26
Author: Joel Goguen <jgoguen@jgoguen.ca>
Date:   Fri Aug 24 21:55:41 2012 -0300

    Use PCRE library instead of ap_regex. Fix unit test so it isn't ignored.

commit 3be2d44ce0b12fd3587f1b434372b46706ca8548
Author: Joel Goguen <jgoguen@jgoguen.ca>
Date:   Thu Aug 23 14:57:10 2012 -0300

    First shot at regex value matching
Run autoreconf for CentOS6