Updated test bootstrapper to fall back to included autoloader
Updated test bootstrapper to fall back to included autoloader

In the event that composer is not present, the test suite will fall
back to the provided autoloader. As part of this change the message for
when "composer install" hasn't been run has been made more predominate.

tedious/Stash,bankiru/Stash,tedious/Stash,localheinz/Stash,andrerom/Stash,AndrewCarterUK/Stash,jaredtking/Stash,graphis/Stash,jaredtking/Stash,AndrewCarterUK/Stash,csburton/Stash,bankiru/Stash,theUniC/Stash,alawnchen/Stash,graphis/Stash,alawnchen/Stash,localheinz/Stash,csburton/Stash,theUniC/Stash,andrerom/Stash