Merge pull request #52 from nbessi/update_80

Update 8.0
Fix exceptions
Fix exceptions
Improve error message anf description string
Merge pull request #56 from nbessi/fix_base_bank_only

Port of base_bank based on PCatinean work
Move payment slip
Port bank to new api
Port company to new API
Extracting payment slip related knowledge

into a new model dedicated to payment slip
Moving media into static
Changing company defaults for payment_slip
Moving font file into static
Adding QWeb report skeletton
Payment slip is know draw using PIL
Fix New API syntax error when proting and remove dead files
Fix invalid variable name
Import payment slip model
Add first version of new payment slip report
Adjusting Slip element position
Adjust amount placement