Hello! I'm a bit new to plugin development so forgive me if I've missed something obvious but I can't seem to deploy a .zip file that actually works. Initially I thought it was just a problem with the plugin that I'm working on but I tried cloning and locally deploying idea-markdown (https://github.com/nicoulaj/idea-markdown) and still ran into the same issue. Both the plugin I'm working on and idea-markdown are language plugins, if that means anything. I'm able to tell they're not working since the icon for .md files remains the intellij default.
I'm able to run the project, the plugin works fine in the sandbox, but when I follow the steps at http://www.jetbrains.org/intellij/sdk/docs/basics/getting_started/deploying_plugin.html the zip file I produce doesnt work at all (when I select Intellij -> Preferences -> Plugins -> Install Plugin From Disk). I've attached the zip being created for reference.
Thanks in advance for any help!