Add submodule tpm (tmux plugin manager)

.gitmodules

@@ -1,3 +1,6 @@
 [submodule ".zplug"]
 	path = .zplug
 	url = https://github.com/zplug/zplug.git
+[submodule "/home/manu/.tmux/plugins/tpm"]
+	path = .tmux/plugins/tpm
+	url = https://github.com/tmux-plugins/tpm

.tmux/plugins/tpm

@@ -0,0 +1 @@
+Subproject commit 06d41226af02ca4f5bcf58169dd4f0a2aa42218c