Implemented a number of additional APIs in Bridge.
Significant cleanup to Bridge UserStats.

1. Got rid of the steam_bridge_ part of function names.  It's not needed
and just adds a lot of lines.
2. Increased text wrapping to 100 characters, which helps considerably
with readability.
Renamed Wine debug channel to 'steambridge'.

1. It looks nicer.
Fixed the name of SteamUserStats in the bridge.

1. This causes a bit of extra work on the Proxy, but worth it to keep
everything named consistently.
Cleaned up a few more Bridge API calls.
Renamed Bridge APIs to avoid symbol conflicts.

1. After more thought, added an extra underscore to the end of any calls
that are otherwise identical to the real Steam API ones.
Merge branch 'master' of github.com:sirnuke/steambridge