Get rid of migration
Remove some api endpoints that are redundant
Some cleanup
Api should have it's own coordinator interface
more cleanup
Don't overuse interfaces if there's no benefit
Use GetQueryString() instead of accessing the internal field
Fix parsing of multiple queries

Fix #885
Use the client instead of manually posting to the server
Get rid of the unnecessary extra argument
Remove some cruft
Use separate file
Remove an unused interface
Move permission checking to permissions
WIP
Get rid of the explain query tests
Fix the change raft test
Add some logging
Simplify the response types
Add profiling endpoints to the http api