STATS part 1

- New routes for each Stats mode (admin, manufacturer)
- Rework of the search method

TODO
- [ ] group the overview by month using Morris.Line
- [ ] restrict manufacturer
- [ ] make it look better
STATS Part 2

- Index with TOP 24 Materials and Manufacturer Rankings

TODO
- [ ] group the overview by month using Morris.Line
- [ ] restrict manufacturer
- [ ] make it look better
STATS Part 2.1

- Restrict access to /stats using AA admin user
Merge pull request #43 from massayoshi/stats

Stats