Tweaked SQLAlchemy requirement (we do not support 0.9.x yet)
non-existing resource reference conf was fixed
issue1: some cosmetic changes
Merge pull request #3 from b8va/master

non-existing resource reference conf was fixed
Reorganizing imports in the mapping module.
Small fix for merged pull request #3 (IGNORE_OPTION should not suppress
an AttributeError being raised for non-existing resource attributes).
Fixed generation of location headers and representations for modifying
resource views in cases where IDs were missing because of delayed
flushing in the backend.
Replaced the imperfect solution for the missing ID problem introduced in
9cc48f99dff42871237051b90cdabab90c13bd30 with a better approach.
Removed a response callback (overlooked in last commit).
Merge branch 'master' of https://github.com/cenix/everest

Conflicts:
	requirements.txt