Added Plugin Scripts.

After wasting about 2 hours on trying to import the history of these two script files from another repository (and learning stuff about some git commands) I am just adding these files as new.

The output json looks like this: https://github.com/dufferzafar/picard-plugins/blob/master/Plugins.json

To test the scripts, you'll need a folder containing picard plugin files. I have a setup here: https://github.com/dufferzafar/picard-plugins
Yeah the dictionary will definitely make more sense but are you talking about using it for just the internal representations (and use the existing list for our json output) or use the dictionary itself in the output? 

Using [dictionaries in the json](http://pastebin.com/pbfs1xni) looks a bit odd, but that's just me.