Refined banner image
Revert "Refined banner image"; liked the first one better

This reverts commit 07652000ac9f50554e469dac2c2eced48c7f7520.
Fix issues link to close #13
Fix FAQ links, close #19
Add Devops and Mobile App class graphic
adding future classes
Merge branch 'refs/heads/integration' into az
Added images to classes page.

closes #25