Loader: refactor loadBitmap to accept a context.
Cookies: Fix multiple cookie persistence.
Bitmap loader: watch for improper usage of resize/deepZoom/transform/center*.
Bitmap loader: resize/center is always the first transform that happens.
Ion: remove request resolver cruft.
Fix https://github.com/koush/ion/issues/161
Watch and filter null values:
query
headers
url encoded body
multipart

Does not work if map is passed in.
Merge branch 'master' of https://github.com/koush/ion

# By Koushik Dutta
# Via Koushik Dutta
* 'master' of https://github.com/koush/ion:
  Watch and filter null values: query headers url encoded body multipart
  Fix https://github.com/koush/ion/issues/161
  Loader: refactor loadBitmap to accept a context. Cookies: Fix multiple cookie persistence. Bitmap loader: watch for improper usage of resize/deepZoom/transform/center*. Bitmap loader: resize/center is always the first transform that happens. Ion: remove request resolver cruft.