Some fixes needed to run gquery with gwt-2.8.0-SNAPSHOT

Data binding over list attributes

null accordingly.

When using gwt-2.8.0 and java8 gwt compiler is more restrictive and
when you override a method(Object) with certain classes like
Interfaces or JSO, there is an error like:
The method $(Object) is ambiguous for the type GQuery.

Also updated lazy interface with new methods.

Updated jquery and Sizzle librairies for the benchmark sample

Added SafeHtml as alternative to html string.

As ClientBundle do, it's now possible to use relative or absolute path
to load js libraries in JsniBundle.

Use absolute path to load library in JsniBundle

As ClientBundle do, it's now possible to use relative or absolute path
to load js libraries in JsniBundle.

Some fixes which should be in current version

Allow to use customized animations. And some Fixes.

- Additionally, I have moved all remaining transform related stuff
 from transition plugin to transform class, and checked that regex
 are updated based on specification (it was a copy from original
 jQuery plugin).
- Adding some tests.

Make checkstyle run when validating sources

In this patch there are many fixes found when playing with plugins.
Also I have refactored Effects and Transitions plugins so as it is
easier to extend and implement customized animations.
Now we use properties instead of the Fx.css3 hack to disable modern
animations.

rewriten API for special events

Styling issues