Add gems for Omega 4 by default.
Make sure to rebuild PHP if cURL is installed from sources.
Remove not used variables.
Contrib: taxonomy_edge-7.x-1.x-dev
PHP 5.5.4
Remove copied irrelevant lines from the cURL install section.
Do not create symlinks when OpenSSL is built from sources.
Do not check OpenSSL headers on OpenSSH install from sources.