Merge pull request #4 from jcsalterego/feature-installation-in-readme

Add minimal installation instructions to README
Remove my crazy notes from the readme. Clean up other bits of the readme
use mmap
pcre_exec(), how does it fucking work?
Meh, make this const
Merge branch 'use_mmap'
Merge pull request #5 from rphillips/use_mmap

This shit is bananas. B-A-N-A-N-A-S.
Linux wants unistd.h for close(). Remove no-longer-used variable.
Merge branch 'master' of https://github.com/ggreer/the_silver_searcher
Add a --stats option
Fix warning about comparing signed and unsigned ints.
THANKS FOR WARNING ME THAT THIS IS FORBIDDEN, GCC. Apparently I was making context_prev_lines an array of length 1 and stomping all over nearby memory.
add more help
Merge pull request #6 from rphillips/more_help

More help
add file-search-regex -G functionality
Merge pull request #7 from rphillips/add_file_search_regex

add file-search-regex -G functionality
Free opts.file_search_regex. Initialize it correctly too.
Dont access uninitialized memory. Thanks, valgrind!
Get ag building on newer versions of Ubuntu and Debian.
I'm not checking this value anyways. Kill it