Homepage language query param

[lpercivalDEV]

Visiting the homepage with a query param ?language=ruby should show ruby results and when you select a language the query param should update

• Change URL based on language query param
• Add missing languages to switch case (list of all langs in controller)
• Users should be able to share specific language links and see a list of issues with that language! (ruby link = ruby issues loaded, python link = python issues loaded, etc.)
• Add "refresh issues" button to left of language drop down menu
• if query doesn't match any language - just drop it and do nothing
• Change local host URL to hacktoberfest URL once languages are added and testing is complete