Updates keywords
Adjusts comments
Moves / renames EC callback template.
Moves class files to /src
Updates keywords
Updates class library path
Updates class path for autoloader
Adds security tip for config file
Updates class path
Updates homepage to Github repo

Home page was set to angelleye.com.  Changed this to GitHub repo based on sample provided by Packagist.
Adjustments to match Packagist sample
Updates description and keywords
Updates PHP version and install details