ack-2.15_02 - A grep-like program for searching source code

Changes for version 2.15_02 - 2015-12-17

This is the first dev version in nine months. Many changes have gone into this, probably more than have been listed here. We need to update this list, but for now these are fixes we know are in here. My apologies for not having this changelog accurate.
FIXES
- Reverted an optimization to make \s work properly again. (GH #572, GH #571, GH #562, GH #491, GH #498)
- Fixed an out-of-date FAQ entry. Thanks, Jakub Wilk. (GH #580)
ENHANCEMENTS
- The JSP filetype (--jsp) now recognizes .jspf files. Thanks, Sebastien Feugere. (GH #586)
INTERNALS
- Added test to make sure subdirs of target subdirs are ignored if --ignore-dir applies to them. Thanks, Pete Houston. (GH #570)

FIXES
- The -l and -c flags would sometimes return inaccurate results due to a bug introduced in 2.14. Thanks to Elliot Shank for the report! (GH #491)
- Behavior when using newlines in a search was inconsistent. Thanks to Yves Chevallier for the report! (GH #522)
- Add minimal requirement of Getopt::Long 2.38, not 2.35, for GetOptionsFromString.
- Don't ignore directories that are specified as command line targets (GH #524)
- Fix a bug where a regular expression that matches the empty string could cause ack to go into an infinite loop (GH #542)
ENHANCEMENTS
- Many optimizations and code cleanups. Thanks, Stephan Hohe.
- Added --hpp option for C++ header files. Thankis, Steffen Jaeckel.
- ack now supports --ignore-dir=match:.... Thanks, Ailin Nemui! (GitHub ticket #42)
- ack also supports --ignore-dir=ext:..., and --noignore-dir supports match/ext as well