more fixes to buy.cpp and sell.cpp, still working on them though
more fixes to buy.cpp and sell.cpp, still working on them though  (Conflicts resolved)
done merging
Merge branch 'master' of https://github.com/KiwiStrongis/nihil-ticket-system

Conflicts:
	assets/errors.cpp
 Updated refund, addcredit errors and addCredit_admin files