Add parser submodule

.gitmodules

@@ -828,3 +828,8 @@
 	url = ../boostlook.git
 	fetchRecurseSubmodules = on-demand
 	branch = .
+[submodule "parser"]
+	path = libs/parser
+	url = ../parser.git
+	fetchRecurseSubmodules = on-demand
+	branch = .

libs/parser

@@ -0,0 +1 @@
+Subproject commit bb0fb885b8f996545cdc5eac67aab8c9bb6a2ce3