samples: add Terra samples

source: https://github.com/zdevito/terra/tree/master/tests

samples/Terra/nestnoerror.t

@@ -0,0 +1,17 @@
+
+
+terra haserror()
+	return (1):foo()
+end
+
+local m = macro(function()
+	local success = pcall(function() haserror:compile() end)
+	assert(not success)
+	return 1
+end)
+
+terra noerror()
+	return m()
+end
+
+assert(1 == noerror())