It seems that the connection pool is keeping sockets open for a long
time and after a quiet period, any connection sent is immediately
responded with with a TCP reset packet causing the connection to fail.

This makes it much easier to figure out what gitlab is throwing at us if
we fail to deserialize something.

We actually abuse it and use it for Request later.

These are complete.

Fixes #5.

Gitlab returns a 404 for users which are not members of a project which
is not distinguishable from the project not existing or any other error.