Changes to install script to allow nginx usage

Added options for "install_nginx" and "remove_nginx"
Added files copied by script changes

Ngnix 'virtual host' config file and php-apc config file.
Bugfix

Missed changing the gzip parameter.
Merge branch 'master' of github.com:S0PH0S/RPi_Cam_Web_Interface
Add support for nginx by S0PH0S
added raspimjpeg v4.2.1; lots of NULL initialization and NULL checks; start_all()/stop_all() create/cleanup the same stuff