expand description of 405 Method Not Allowed

also expand HTTP Option request explanation
Merge pull request #713 from stevewasiura/patch-7

expand description of 405 Method Not Allowed
Add donors
Merge branch 'master' of https://github.com/bcosca/fatfree
Adding support for composer autoloading
Merge pull request #718 from xmeltrut/master

Adding support for composer autoloading
Replacing PSR-4 autoloading with a direct call to base.php
Merge pull request #721 from xmeltrut/feature/autoloadmap

Replacing PSR-4 autoloading with a standard file map