Round 1 of version 2 with debugging in place.

Detection of connection type, pixel density, and speed test in place.

Updated to use transparent gif and background image.
Fixed issue with space at the bottom.
Added support for data attribute based, min and max width breakpoints.
Split out array of breakpoints into max and min arrays so that they could be sorted in opposite directions.
Moved breakpoint logic into its own jQuery plugin.

Updated to not overwrite width and height attributes on img if they are present.

Add param for using transparent gif and src of transparent gif.
We no longer need to update the source on window resize so removed it.
Tested single pixel option in IE6 and iE7
Refactored $.hisrc to support being called multiple times on the same set of elements.

Added $.hisrc.speedTest function for performance to optionally run before DOM has finished loading.
Updated README

Removed debugging calls

Updated speed test url to not use foresight's url.
Added package.json file to be ready for new jQuery plugins site.
add support for browsers that do not support devicePixelRatio but support media queries in javascript
Added Simple Callback
Need to change the speedTestUri to something other then my Amazon

This is costing me $20/mo
Merge pull request #3 from crdeutsch/patch-1

Need to change the speedTestUri to something other then my Amazon
Merge pull request #1 from michelv/media_query

add media queries for browsers that do not support devicePixelRatio
Merge pull request #2 from seancorgan/Callback

Added Simple Callback
Update README.md
Update README.md
Update README.md