Adds readme.

Author: jaubourg

README.md

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+## About
+
+jQuery-JSONP is a compact (1.8kB minified), yet feature-packed, alternative solution to jQuery's implementation of JSONP.
+
+## Features
+
+jQuery-JSONP features:
+* *error recovery* in case of network failure or ill-formed JSON responses,
+* precise *control over callback naming* and how it is transmitted in the URL,
+* multiple requests with the *same callback name running concurrently*,
+* *two caching mechanisms* (browser-based and page based),
+* the possibility to *manually abort* the request just like any other AJAX request,
+* a *timeout* mechanism.
+
+jQuery-JSONP publishes a $.ajax()-like function called $.jsonp(): similarity ensures programmers get up-to-speed easily.
+
+For instance, as of version 2.3.0, $.jsonp() returns a promise when used in conjunction with jQuery 1.5+.
+
+## Compatibility
+
+jQuery-JSONP has been tested and runs within all major browsers, namely:
+* *Internet Explorer 6+*
+* *Firefox 2+*
+* *Chrome 1+*
+* *Safari 3+*
+* *Opera 9+*
+
+jQuery-JSONP has also been tested with jQuery 1.3.x up to 1.7.x
+
+## Documentation
+
+* [[API Documentation|API]]
+* [[Tips & Tricks|TipsAndTricks]]