MusicPlus Core Lua functions

Lua functions to use the new MusicPlus core features (!1 (closed))

This may not make it into 2.2 because, a long time ago, Monster Iestyn expressed importance in keeping Lua safe and idiot-proof. One danger that needs idiot-proofing is distinguishing local vs. non-local players, because that can introduce net instability. Music, being inherently local, makes it easy to determine who is local and who is not.

Therefore, I'm not certain whether Lua can make it. Perhaps it can be merged in with #define HAVE_LUA_MUSICPLUS commented out.

mentioned in merge request !7

added 865 commits

• 2c1b91a1...1aacfee8 - 864 commits from branch public-musicplus-core
• 831752dc - Merge branch 'public-musicplus-core' into public-musicplus-lua

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mentioned in merge request STJr/SRB2!447 (merged)

added Won't MR label