Snippets for font icons feature for Icon Widget

Adding two snippets to show how use the font icon and external css features with Icon Widgets
Merge pull request #66 from fab-b/master

Snippets for font icons feature for Icon Widget
Documentation on sync requests (new feature)

The new feature that permits to send synchronous requests is documented in this commit, accordingly to the specs, and warning the user to use them only when strictly needed.
fix #70 Update of framework version in page engine and auto-resize samples
Snippets for article on packaging

This commit introduces the snippets for the documentation article about https://github.com/ariatemplates/ariatemplates/pull/1235.

Close #68
Sample for safetap event usage

clickbuster usage through safetap event shown in a sample for mobile browsers

close #69