Fill phone and fax on invoices/estimates autocomplete. Fixes #2.
Added Expense Type on supplier
First aproach to expenses module
Added supplier reference and expense type
Added a file with KNOW_BUGS
Don't show discount on expenses
Load supplier by name on expenses and fix taxes error.
Added show view of expenses
Show tax details and Customer Phone/Fax on the show view. Fixes #3.
Correctly add Taxes to the expenses lines
Remove printing options from expenses
Let the user manage the status of the invoice
Remove unused methods
Customize expenses search form and expenses list
Add Payment management on expenses. Manage the invoice status depending if it has been payed or not.

This reverts commit c7e9ea64fcf4f7ea52d59f41e951f1e0992d32fd.
Save the supplier on the database if not exists
Fix typo
Link supplieres list with their expenses
Fix search by supplier
Allow to add taxes on expenses