[FIX] l10n_ch PEP8 and convention
[FIX] PEP8 and Licence to AGPL for l10n_ch_bank
[FIX] PEP8 and convention for l10n_ch_credit_control_payment_slip_report
[FIX] PEP8 and convention for l10n_ch_dta
[FIX] Missing licence
[FIX] PEP8 and convention for l10n_ch_payment_slip
[FIX] Missing Licence
[FIX] PEP8 convention and licence for l10n_ch_scan_bvr
[FIX] PEP8 and convention for l10n_ch_sepa
[FIX] PEP8 and licence for l10n_ch_zip
[FIX] l10n_ch_zip licence