Make sure these are only compiled under Lua 5.1.
Fix code to use luaL_Reg instead of luaL_reg.
Okay, make these two modules compiler under Lua 5.2

Can you tell I'm having difficulty choosing how to handle Lua 5.1 and Lua
5.2?  I don't like any of the solutions, but this way seems to be the best
if I want to support LuaRocks.
Convert org.conman.date and org.conman.table to run under Lua 5.2