1. Add navigation link to all portal pages.
2. Septization client pages
3. rewrite 10% audit rule
On openerp client side:
1. Fix button "create draft invoice".
2. rewrite price calculation method.
3. Add Group check-box to create invoice based on multiple packing slips.
4. Define new status of invoice: draft, Septa Manager Approved, Vendor Approved, Paid.
5. Add function to handle invoice processing.

On Vendor client side:
1. Display invoices that are in "Septa Manager Approved" and "Vendor Approved" status.
2. Add to option button for vendor, "Approve" and "Deny"
Handling invoice display and processing
Handling invoice display and processing
Merge pull request #1 from lx881219/XiangLi

Xiang li