Fix crash when calling free on memory managed by Lua.
Let Lua manage the life-cycle of AudioTransmission memory.
Merge pull request #2 from ers35/free-crash

Fix crash when calling free on memory managed by Lua.
Paths in .gitignore should be fixed to the project root
Pulled in updated Mumble.proto
Added piepan.User.hash
The API reference should have full stops at the end of each bullet item.