Integration tests

[alfreb]

We need integration tests for acorn, Including, but not limited to:

• Verify the file content of all text files
• Verify that all routes provide valid json and that the ones where you expect frequent updates actually do update
• Stress: verify that the VM survives things like ping- and http-flooding, and that memory usage is as expected after stress
• Verify that all kinds of invalid http requests produce suitable status codes (e.g. index.asdf, /non/existing/file`
• Verify that requests with a method not subscribed to for a route gets dropped / does the right thing

...etc.