Updated welcome

Some people apparently did not get that the title was jestful hyperbole.

To make sure nobody is confused over intentions I've moved the disclaimer up and merged it with the Welcome section. This site is here to help people learn, nothing more.
Merge commit 'ccdaf659cd1cb4916d050a9ce795ec2918a75213' into gh-pages

Conflicts:
	_includes/welcome.md