Plugins: add a plugin helper plugin

The purpose of this plugin is to assist with the use
  and interaction of other plugins.

  Current features are as follows
  - list all plugins
  - list all enabled plugins
  - list all plugins with README files
  - print the README file of specified plugin (similar
    to the man function for other CLI programs)
  - print all aliases of specified plugin(s)
  - enable a specified plugin
  - disable a specified plugin

plugins/plugin-helper/README.md

@@ -0,0 +1,48 @@
+## OH-MY-ZSH PLUGIN HELPER
+
+This is a pretty straightforward plugin for oh-my-zsh that's sole purpose is to
+be a helper for other available OMZ plugins.
+
+---
+
+### FEATURES
+
+| Function              | Alias | Description                                   |
+|:----------------------|:-----:|----------------------------------------------:|
+| disable_plugin        | phdp  | Disable specified plugin                      |
+| enable_plugin         | phep  | Enable specified plugin                       |
+| print_all_plugins     | phpap | List all plugins                              |
+| print_enabled_plugins | phpep | List all enabled plugins                      |
+| print_all_readmes     | phpar | Get a list of all plugins with a README       |
+| print_aliases         | phpa  | Print list of aliases for specified plugin(s) |
+| print_readme          | phpr  | Print README for the specified plugin         |
+
+---
+
+### NOTES
+
+The output of the README's  in the print_readme function looks a lot better with
+[Pandoc](http://johnmacfarlane.net/pandoc/), but it's not required.
+
+##### Mac OS
+```
+brew install pandoc
+```
+##### Ubuntu
+```
+sudo apt-get install pandoc
+```
+
+---
+
+### LICENSE
+
+The project is licensed under the
+[MIT-license](https://github.com/mfaerevaag/wd/blob/master/LICENSE).
+
+---
+
+### CONTRIBUTORS
+KhasMek - Creator
+
+---