Editable

@acolochado,

I like your chrome extension and decided to enhance it, hopefully you find my changes useful.  Basically, the use case I wanted to support was not only examining query string parameters, but also having the ability to edit them and test the edits in a new tab.  Therefore, I changed the popup to have the values displayed in a content editable div.  Once you make the changes you want, you just hit enter and they take effect in a new tab.  I also added the ability to add new parameters, and I add parsing of the #hash values (assuming they have the same key=value& syntax of the query string) -- google.com's hash maintains that convention.

Thanks!
@jlank