Update studygroup.html.erb

Add initial Track 2 markup
merge in newest changes, fix conflict in studygroup.html.erb
Merge pull request #23 from afshinator/dev

Merge stuff
tweak stylings and language
add week 4 study group basics
add link to study group week 4
Merge pull request #24 from gorchov/study-group

add link to study group week 4
reduce size of large jpg images
expire assets
Skip lengthy introduction

Use this URL http://youtu.be/d0uKY2kLKmk?t=6m8s to link to the to the "May 2013 Engineering Software as a Service" - video.
Merge pull request #25 from MaxSchumacher/patch-1

Skip lengthy introduction
add the Hangout link for rails track
delete picture, recommit studygroup
fix typo
Merge pull request #27 from afshinator/dev

Dev
Merge branch 'master' into dev
update hangout link
reduce image sizes
redirect scheduler to courses page
remove scheduler view and static page route