LADX: Autotracker improvements

[kbranch]

What is this fixing or adding?

This brings the client's built in autotracking up to parity with Magpie's standalone autotracker:

• Entrances are autotracked, and visited entrances are stored in server data storage so they persist across sessions. We send the server a SetNotify for the key so that players can co-op the entrances in a slot.
• The player's location is tracked down to the tile rather than the screen
• Current rupee count is autotracked
• To keep item counts from jumping around, some checks add back the items they consume when checked, e.g. 20 shells from the Seashell Mansion, Ribbon from YipYip, etc.
• The client now reports a bit more info about itself to Magpie, to match the current version of its communication protocol

The main RAM reading code has been expanded and modified to support this. Retroarch is pretty slow to read RAM - the added reads should've slowed the main loop down, but some of the existing reads weren't being cached. In my testing, the main loop actually takes less time per tick now.

Most of this is ported from Magpie's autotracker. The original code is MIT licensed, and I'm the author.

How was this tested?

I tested each change as thoroughly as I could as I went, and play tested various scenarios.

This code is currently in the LADX beta build and being tested by users.

[threeandthreee]

Its been tested in the beta release

[palex00]

I tested this in three Syncs, working flawlessly. An Async is on the way to test this further but I'd love to have this in 0.6.0