Fix typo
Added a new section called "Animation", including Universal Tween Engine and Spine Dart
Merge pull request #11 from FedeOmoto/master

Added a new section called "Animation", including Universal Tween Engine...
Add Template section with mustache4dart and jaded
Remove redundant references to Dart
Clarify what makes items on the list awesome
Add SDK criteria
Add Everything Else section
Update README.md

mention shelf packages
Merge pull request #14 from Andersmholmgren/master

Add mention of the existing ecosystem of shelf packages