• Update to 20110912

Chabgelog:
+ Rewritten fast matcher code: slight performance improvement and better

scalability, more reliable, more fine-grained (handles a wider scale of
patterns), uses Turbo Boyer-Moore and Quick Search algorithms

+ Readd --mmap, default is still read(2)
+ Support xz/lzma archives
+ Bugfix: support of empty pattern
+ Bugfix: pattern file cannot be a directory
+ Bugfix: proper error handling when using -F / fgrep
+ Bugfix: fix handling of ^$ anchors
+ Bugfix: partly fix content after last match of -m