2.2.0rc1 -> 2.2.0rc2

Basically no changes except for whitespace and satisfying pep8.

version -> 2.2.0rc1 and update copyright date

fixing install-mininet-vm.sh

Remove extra git clone line

Update documentation link

2.1.0p1 -> 2.1.0p2, and update copyright to 2014 (fwiw)

Fix typo

pass code check