allow luaget/luaset/luacall to access tables and methods, improve type conversion, add bl.string, begin adding matrix

src/util/libts-lua.lua

@@ -192,12 +192,6 @@ function require(mod)
 	return _bllua_requiresecure(mod)
 end
 
--- Exposure to TS
-function _bllua_getvar(name) return _G[name] end
-function _bllua_setvar(name, val) _G[name] = val end
-function _bllua_eval(code) return loadstring(code)() end
-function _bllua_exec(fn) return dofile(fn, 2) end
-
 local function isValidCode(code)
 	local f,e = loadstring(code)
 	return f~=nil