Integrate git-open module

.gitmodules

@@ -19,3 +19,6 @@
 [submodule "modules/autosuggestions/external"]
 	path = modules/autosuggestions/external
 	url = https://github.com/tarruda/zsh-autosuggestions
+[submodule "modules/git-open/external"]
+	path = modules/git-open/external
+	url = https://github.com/paulirish/git-open

modules/git-open/README.md

@@ -0,0 +1,17 @@
+git-open
+====
+
+[git-open][1] opens the repo website (GitHub, GitLab, Bitbucket) in your browser.
+
+Authors
+-------
+
+The authors of this module should be contacted via the [issue tracker][2].
+
+    - [Rui Coelho](https://github.com/rjcoelho)
+    - [Paul Irish](https://github.com/paulirish)
+    - [Sorin Ionescu](https://github.com/sorin-ionescu)
+
+ [1]: https://github.com/paulirish/git-open
+ [2]: https://github.com/sorin-ionescu/prezto/issues
+

modules/git-open/external

@@ -0,0 +1 @@
+Subproject commit ce8fb125322907a5dd91ebfe7fd7937ac641c664

modules/git-open/init.zsh

@@ -0,0 +1,6 @@
+#
+# Load git-open Module
+#
+source "${0:h}/external/git-open.plugin.zsh"
+
+