Bug 429521 - make welcome screen graphics/color consistent with new logo

Commit for "what's new" and "migrate" icons. 
(And, I removed the 'gif' versions what were replaced by 'png' images). 

8 files changed
tree: ef520e714e9629bef7e97a2776a8b4089e2dffd4
  1. .gitignore
  2. ant/
  3. platform/
  4. pom.xml
  5. update/