Only allow deepZoom for API level >= 10.

Change-Id: I5f1048c3784ca43196cd2ba18313e53531b75ab7
v122

Change-Id: I88dc4fe527bdad896057c0d466d948585e3f68ca
Merge branch 'master' of https://github.com/koush/ion

# By Koushik Dutta
# Via Koushik Dutta
* 'master' of https://github.com/koush/ion:
  v122
  Only allow deepZoom for API level >= 10.