Update Nginx compile script to use OpenSSL 1.0.1h
grep the nginx version for Nginx and OpenSSL versions

This allows us to upgrade openssl without a bump in Nginx
Recompile Nginx when pagespeed version is bumped
Ensure the system version of openssl is updated

We compile a downloaded version of openssl with nginx, but we
should also make sure the package provided for CentOS is always
updated.
Merge pull request #101 from washingtonstateuniversity/update/openssl

[PR] Update OpenSSL per security advisory