Version bump to v0.9.8
Merge branch 'feature/365_single_sale_handling_in_post_pricing_form'
fixed broken return of revenue_model for differnt pricing_types #367
added static "ppu" for dynamic pricing type #367
#367 Fixed condition of fallback
Merge pull request #368 from laterpay/feature/367_incorrect_return_of_revenue_model

Feature/367 incorrect return of revenue model
updated php LaterPay client
#365. Slightly refactored post pricing form, removed selected class from category and global default prices revenue models.
#365. Minor changes for category revenue model in post pricing form.