Fix a load of issues, add luacheck and travis

.luacheckrc

@@ -0,0 +1,35 @@
+unused_args = false
+allow_defined_top = true
+
+exclude_files = {
+	"mods/default",
+	"mods/ctf_pvp_engine",
+	"mods/shooter",
+	"mods/wield3d",
+	"mods/treasurer",
+}
+
+
+globals = {
+	"crafting", "vector", "table", "minetest",
+	"worldedit", "ctf", "ctf_flag", "ctf_colors",
+	"hudkit", "default", "treasurer", "ChatCmdBuilder",
+}
+
+read_globals = {
+	string = {fields = {"split"}},
+	table = {fields = {"copy", "getn"}},
+
+	"dump", "DIR_DELIM",
+	"sfinv", "creative",
+	"irc",
+	"VoxelArea", "ItemStack",
+	"Settings",
+	"prometheus", "hb",
+
+
+	-- Testing
+	"describe",
+	"it",
+	"assert",
+}