lua 5.2 support

[mcandre]

Trace:

$ luadist install metalua
Downloading repository information...
Finding out available versions of metalua...
Getting metalua-0.5 (binary)...
 - trying another candidate due to: Error getting dependency of 'metalua-0.5': Package 'lua ~>5.1' needed, but installed at version '5.2.3'.
Getting metalua-scm (source)...
Cannot install package 'metalua': Error getting dependency of 'metalua-0.5': Package 'lua ~>5.1' needed, but installed at version '5.2.3'.

$ luac -v
Lua 5.2.3  Copyright (C) 1994-2013 Lua.org, PUC-Rio

[alexbw]

+1

Duplicate of #12