remove dead code
Merge branch 'strawlab-electric'
tests: move DB connection stuff to module setup/teardown
tests: can print results with env var
allow strings with null characters to be saved to postgres
adjust value so that postgres passes test (dodgy)
adjust value so that postgres passes test (dodgy)
bugfix: actually handle backreferenced arrays correctly
test prefixes (currently failing)
bugfix: prefix tests pass
enforce prefixes start and end with '/'
bugfix: ros node also uses correct prefix