Added remote_* functions to make script easier to read.  Also modified script to install script, if possible, otherwise it exits and prompts the user to install it.
Added remote_* functions to make script easier to read.  Also modified script to install script, if possible, otherwise it exits and prompts the user to install it.

dmikusa-pivotal/cf-php-buildpack-binary-build-scripts,cloudn/cf-php-buildpack-binary-build-scripts,dmikusa-pivotal/cf-php-buildpack-binary-build-scripts,cloudn/cf-php-buildpack-binary-build-scripts