Merge pull request #5 from joegreen88/show-active

List active and available versions when running php-version without parameters

Update README.md

Merge pull request #4 from joegreen88/custom-build-args

Add buildargs directory where user can add custom php compile arguments.

Merge pull request #3 from joegreen88/list-versions

Update README.md

Add php-version list command

Merge pull request #2 from devsoul/master

Add base support for Linux.

Fix readme regarding php.ini paths

Set up autoconf on OSX (allows pecl to be used in built php versions)

Add script for activating the php version globally.

Add custom php.ini location for each build, and create on the fly if doesn't exist.

Fix comment some more