Cache reflection operations#25

Merged

SphtKr merged 11 commits intomasterfrom

cache-propmaps-issue23

Jan 29, 2015

Commits on Jan 23, 2015

Commits on Jan 26, 2015

Commits on Jan 29, 2015

Incorporated feedback from #25, including removing unneeded default constructors. Added caching to `IsSerializedAsMany` and `GetElementType`. Made `ModelManager` a little more subclassing-friendly.
SphtKr
committed