update styling
add integration test for blank field on new link page
update form styling
add table for snippets
add category_id column to snippets table
test for relationship between categories and snippets
add link for new snippet on category show page
add new method to snippet controller
add view for new snippet form
complete create route for snippet controller
add back link for snippet view page
add integration test for creating a snippet
add integration test for incomplete information in snippet description field
add integration test for showing a snippet page
clean up unused files
remove unused file