Eve expects 'flask>=0.10.1,<=0.12' so we can't use flask==0.12.2 in
pillar for now.
This needs to be fixed upstream (eve), but for now `python setup.py
install`.
Refactor of pillar-server and pillar-web into a single python package. This
simplifies the overall architecture of pillar applications.
Special thanks @sybren and @venomgfx