Update to add week 8 notes

Almost done with the curriculum!
I updated the PR to include the week 9

This is the last and final study group. The last few sections will not take as much time and most people have already completed them. Thank you for the opportunity to do this and best of luck with your endeavors.
make changes to fix the errors in studygroup
set up new installation, remove obsolete gem
Add onScroll hide effect Coffeescript
Add transition and transform mixins
Add styling and invoke effect on lesson pages
Add IE8 support
Include option to show navigation on mouse enter, hide on mouse out
reference contribs