Added package.json to make this module publishable to NPM.
Added package.json to make this module publishable to NPM.

DmitryNek/imgcache.js,chaddjohnson/imgcache.js,nixplay/imgcache.js,DmitryNek/imgcache.js,nixplay/imgcache.js,sdesalas/imgcache.js,chaddjohnson/imgcache.js,andrew168/imgcache.js,sdesalas/imgcache.js,practicalmeteor/imgcache.js,practicalmeteor/imgcache.js,martinjbaker/imgcache-mjb,martinjbaker/imgcache-mjb,andrew168/imgcache.js