[REFACTOR] l10n_ch_payment_slip_report 
* Removing deprecated BVR report from invoice
* PEP8
* Replacing deprecated except_osv by except_orm
* _space become a static method
* DRY some code
[ADD] hook to allows to override BVR/ERS report total amount
[REFACTOR] following fix of bug lp:1308364
[RM] dead code
[RM] forgotten pdb
[REFATOR] credit control payment slip to support crdit.control.line and move line relation cardinality
[FIX] cleaning tree of unused files
[IMP] file name to use datetime
[FIX] addons version
[FIX] addons description et version
[IMP] Change log
[FIX] community conventions
[FIX] change account 1170 to 2200 for onsales taxes
[FIX] remove unuseful comment
add a summary
TYPO
add missing contexts
fix indent
remove import of orm imported twice
[PEP8] in multi_report_webkit_html.py