fix imagemagick build now that they seem to be having a proper release archive, refs #72
adjust PHP RC download location URLs
PHP 5.5.17+ do not need the patch
PHP/5.5.18
PHP/5.6.2
remember versions in the slug instead of in the cache
ext/newrelic 4.15.0.74
follow symlinks in composer php/bash check, just in case
fix .phar detection for newer versions of 'file'

newer versions appear to return 'data' instead of 'php script' for composer.phar
fix .version info dir creation
add explicit -p option for port to boot scripts
fix composer setting error messages not being echo'd to STDERR
HHVM/3.3.1
ext-mongo/1.5.8
fix HHVM only builds with composer.phar
PHP/5.5.19
PHP/5.6.3
easy-to-ref nginx named location for fcgi-php
deprecate HHVM on cedar
automatically install extensions required by dependencies