This change makes the updater sleep for a small portion of time before
it continues to try and obtain a lock for running the updates. This will
prevent the CPU from being pinned in the case where an error is
consistently failing an update.
Fixes#415.
This puts config in its relevant location and moves functions around
loading config files into the main package.
As a side effect of removing cyclic imports for the API config, the
context library is no longer used.
