Merge pull request #5 from romhut/master

Include mime.types for Nginx
set php_ini for pecl installs
Update README.md
Using Zend Opcache instead of APC for all PHP versions
Add missing file
Temporary turn on buildpack debug mode
Turn off PEAR settings for now, will return when installation of custom extensions is allowed again
Add MIT License
Add Changelog
Add support for compile time commands
Remove resetting
Use php from build dir for pear
Use export
Set PEAR install dir
Echo output of pear commands
Use right path to PEAR files
Set only php.ini location
Pass env variables to compile commands
Remove PEAR support again, doesn't work
Use /app/vendor/php/bin/pecl to install ZendOpcache on 5.3 and 5.4