Update README.md

Noting this works on Amazon Linux, which is a RHEL derivative
COOK-2928

* Abstract php directives in templates to a variable.
Move lib_dir to be above ext_dir definition on rhel
t1lib package for centos 5 available in epel
[COOK-3101] - abstract EL 5 versions to a method
[COOK-3102] - remove fileinfo recipe
remove fileinfo from modules test
corrected apc pecl name
Merge pull request #37 from slashterix/COOK-3050

COOK-3050 - lib_dir declared in wrong place for redhat
release v1.2.2
increment version for development
Merge pull request #18 from solarce/patch-1

Update README.md
[COOK-2378] removed unnecessary shell escaping from php_pear
update to new bucket for boxes
Merge pull request #23 from timurbatyrshin/master

[COOK-2378] php_pear does not work for libevent
Merge pull request #34 from rjocoleman/COOK-2928

[COOK-2928] make php.ini directives a chef variable