Update README.md
Refactoring demo page code and comments.
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Added animation styles for use with ng-show.
Merge pull request #5 from sathishvj/master

Added animation styles for use with ng-show.
Update README.md
Update README.md
Update README.md
ng-show pre
fixed some bug, and ng-show / ng-hide support!

1.  Add and support ng-hide / ng-show animations.
2. Update fontello icons.