First cut at import of quick tutorial.
All the references re-wired.
Fix naming of virtualenv prefix.
rename ref mako_templates to available_template_system_bindings
s/env/venv just for sake of consistency
make example links clickable, for convenience
Merge pull request #1123 from tshepang/docs.quicktutorial

s/env/venv + make example links clickable
Merge branch 'docs.quicktutorial'
Merge branch 'master' of https://github.com/Pylons/pyramid
Added a note to CHANGES.txt, push the quick tutorial.