Added missing Content-Type to requests with JSON data
Modified budgetinfo to both streamline the interface
Also added list all capabilities
Added autocommit after running of query
Fixed small bug in parameter list of last_id member of Query
Merged budget querying functions into a bigger function providing
all information about the budget
Fixed bug in checking of content-length
Fixed bug in query to get dependencies
Added debugging log messages to make tracing of requests easier
Added id field to results of add_voorraad
fixed loop running out of range in use_voorraad
Added querying of vereniging information
Added handling of facturen