fix embedding of subdocument into missing field
Merge branch 'develop' of github.com:aikoven/eve into aikoven-develop
add test for embedding into a missing field
Merge branch 'develop' of github.com:aikoven/eve into aikoven-develop
Daniel Lytkin
Fix KeyError when embedding on a missing field.

Addresses #319 and #433.
Merge branch 'aikoven-develop' into develop