[ADD] FIXED create_from_ui inheritable to add more fields on order and payment
[MERGE][IMP] Enable HTML in emails signature

Closes #801
Merge pull request #326 from hmen89/master

[ADD] point_of_sale: make the creation of orders and payment inheritable in create_from_ui method
[FIX] website: correct geoip resolver

- "`record_by_addr()` method require the city database.
- The loaded geoip database can be specified via config file
[IMP] Make Changes in demo file and remove unnecessary changes