Merge pull request #53 from AndyYou/master

fixed issue but not yet
Merge pull request #54 from AndyYou/master

fixed issue of two foreignkey in a model
Disable project create/edit view fields by rank
Modify navbar layout
Modify view
Update xsd file and update report
Add workinghours subtotal by each company
Merge pull request #39 from CalvertYang/master

Merge code and modify UI