Better api integration

See merge request chehabfl/outgoing_rex!24

Currency update

See merge request chehabfl/outgoing_rex!23

Backend simplification

See merge request chehabfl/outgoing_rex!22

usefull links validation using custom validation

Add new unit test that make it fail

Better backend generation (now with admin.py)

Backend generation

See merge request chehabfl/outgoing_rex!21

Versionning and moderation update

See merge request chehabfl/outgoing_rex!20

Feature post and put

See merge request chehabfl/outgoing_rex!16

New Frontend initialize

Closes #11

See merge request chehabfl/outgoing_rex!15