store: Implement 'mark item delivered' button
store: Check for infodesk permission when marking things as delivered

Just in case some user decides they don't want their tickets after all.
store: Display stamp-like graphics on delivered items
Kompokoneiden nimet ojennukseen ja uudempi Ubuntu
64 bitin oikea kirjoitusasu
store: Make 'delivered' stamp on items compatible with old browsers
store: Improve usability when marking multiple items as delivered
Merge the two store-v2 branches
main2014: Remove mysterious broken import