Milestone 2.1.2 issues solved

Solved some minor issues :
#49 #50 #51 #52

- New web app design
- New home page with list of species
- Storage devices management : Create storage devices in a Location, store seedlot in thesedevices
- Germplasm management : Upload germplasm with files and link data to germplasms, new forms to create/update germplasm
- New species profil page : This page include a map with farmer using this species
- Update Germplasm profil page : Germplasm page include a map of fermers using this germplasm, also a network picture of this germplasm history
- Graph network explorer : An interface representing a network of seedlots
- Update germplasm model : modify the name field : the real name of Germplasm without constraint on this name, add a field idgermplasm : the id used in the SeedLot names (with constraints on the name)