Added log ids to logs

[gorbit99]

This PR attempts to implement #226, but is currently very work-in-progress and exists as more of a starting point than a final draft.

Each module of the code, besides getting the prefix, also gets an identifier, usually a lowercase version of its name, like "sensormanager" or "battery" or "fs", etc etc. Each module then has a list of numbers corresponding to one or a few messages all falling within the same narrow category, for example, the "Handshake successful, server is ..." message gets the unique HandshakeSuccessful id (connection-5), but anything that's manual calibration related would likely get the CalibrationInstruction id (sensor-9).

The format is then as follows:

{connection-5} [UPDConnection] [DEBUG] Handshake is successful, server is ...

The benefits of this technique:

• Everything is specified, nothing is up to chance or code generation
• "Collisions" are only possible if the programmer messes up, which are easy to notice
• Changing texts around has no effect on the ids
• The format string is still visible and is where it's used

And the cons:

• Everything needs to be manually set up
• If it's necessary to separate out a bunch of lines uniquely, that will be a lot of enum values

There are a couple other ways to go about this, in particular

• Creating either pairs of a format string and an id then referencing that instead
• Keeping all the strings used in the project in a single file then referencing them by ID

For several reasons I didn't like either of those options, so I went with this one instead.