Simplify belongsTo materialization
add a failing test for embedded hasMany not able to retrieve its belongsTo side
Set inverse belongs-to for embedded has-manys

This closes #368 and #941.
add regression test for about filtering on an embedded hasMany
Merge pull request #970 from sly7-7/filter-embedded-regression-test

add regression test about filtering on an embedded hasMany
fix path issues for upload to s3

i am an idiot. :)
Merge pull request #972 from fivetanley/patch-1

fix path issues for upload to s3
return a promises from the transactions