Merge pull request #189 from moomalade/loadmodule_error

Improve module loadfile() error messages

src/_premake_main.lua

@@ -68,6 +68,9 @@
 				if chunk then
 					return chunk
 				end
+				if err then
+					return "\n\tload error " .. err
+				end
 			end
 		end
 

src/base/globals.lua

@@ -74,7 +74,10 @@
 ---
 
 	premake.override(_G, "require", function(base, modname, versions)
-		local mod = base(modname)
+		local result, mod = pcall(base,modname)
+		if not result then
+			error( mod, 3 )
+		end
 		if mod and versions and not premake.checkVersion(mod._VERSION, versions) then
 			error(string.format("module %s %s does not meet version criteria %s",
 				modname, mod._VERSION or "(none)", versions), 3)