Clone submodules as HTTPS instead of SSH

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "use/bgrabitmap"]
 	path = use/bgrabitmap
-	url = [email protected]:bgrabitmap/bgrabitmap.git
+	url = https://github.com/bgrabitmap/bgrabitmap.git
 [submodule "use/bgracontrols"]
 	path = use/bgracontrols
-	url = [email protected]:bgrabitmap/bgracontrols.git
+	url = https://github.com/bgrabitmap/bgracontrols.git