[ADD] - sale_commission: Added search by invoice date and period, added commissions with ammount 0 to be marked as paid and initial report draft.
[ADD] - sale_commission: added commissions report template and fix.
[ADD] - sale_commission: Verified report contents and set it as base64 string.
Merge pull request #27 from CLEARCORP-dev/7.0_sale_commission

[ADD] - sale_commission: Added report, search on commission by date and period, fields on tree view