Splitting plugin in files

[xoft]

Cuberite loads all Lua files in the plugin's folder, and initializes them in alphabetical order, except for the Info.lua file, which gets initialized always as the last one.
Note that the sort order is case sensitive, so on platforms with case-preserving filesystems (almost all todays platforms, including Windows) it makes a difference if you name your file A.lua or a.lua.