bumped version in readme

bumped version in readme

minor improvements

Changed the IAS loader block to accept general HTML and insert that

in the container ".ias_loader" DIV,
Added a an onRenderComplete callback which kicks in once the content has
been fully inserted into the DOM,
Added contributers list to the readme

added tresholdMargin option,

added history option

added onLoadItems callback,

added Advanced Usage section to readme

Fixed bug causing IAS not working in IE8, thanks to Varun Mishra.

added paging module,

added history module,
added onPageChange option

First release.