Clean up deferred load processing.

Change-Id: Ic82bee2176d7d1123e9645eb1bcefd496dfdc577
Merge branch 'master' of https://github.com/koush/ion

# By Koushik Dutta
# Via Koushik Dutta
* 'master' of https://github.com/koush/ion:
  Clean up deferred load processing.