Styled Form/Sidebar

Added styles to make form and sidebar easier to use and more appealing
Screenshot and save JSON

Added html2canvas to app
  - allow user to click link and generate an image of the map for
download

Added functionality to save data (json)
  - saves json file to app and generates a url string
  - redirects to post to twitter with url and quick message
ignore scss files and generated json
ignore sass cache
.gitignore