Fix recycling bug. Any time the callback key changes, must cancel.
Call unregister in cancel. This may be bad?
Execute or defer the bitmap action after the imageview unregisters.
manifest fixups
Merge branch 'master' of https://github.com/koush/ion

# By Koushik Dutta
# Via Koushik Dutta
* 'master' of https://github.com/koush/ion:
  manifest fixups
  Execute or defer the bitmap action after the imageview unregisters.
  Call unregister in cancel. This may be bad?
  Fix recycling bug. Any time the callback key changes, must cancel.