quick safari fix
added color selector(jscolor), fixed chrome/safari (webkit errors) and made the canvas appear in the center of the scren
fixed some offset and resizing bug in some browsers, should work with safari, chrome and FF
fixed buggy circle bug
added downloading
added line tool and buggy line button
adding base64.js and canvas2image.js for downloading image ability
moved canvas2image and base64 info dir, maybe it'll work