Upload first version to Shiny server

[silasprincipe]

In order to upload the first version to the Shiny server we need to:

• [x] Create list of pictures for front page
• [x] Correct map front page @silasprincipe
• [x] Correct shapefile link (clicking should lead to site) @silasprincipe
• [x] Correct sites reference @silasprincipe
• [ ] Correct climate tab dashboard @silasprincipe
• [x] Add requirements to requirements.R
• [X] Convert image gallery top tab to modal @silasprincipe

The last one is very important. I added the requirements file as a template. We need to ensure that all needed packages, including those from GitHub, are listed, so we can install all of them on the Shiny server.

[silasprincipe]

@pieterprovoost @SSuominen1 if you used any specific package, please add to the requirements. I still need to list all the ones I used.