adding style login and sign up form
including hover and active style on icons and adjusting form layout
adding jquery show/hide form
styling show list page
style tweaks - update edit form
styling nav bar
styling nav bar - nav pills
nav bg color
list show page - don't show blank notes on show page
Merge branch 'frontend-stuffs'

Conflicts:
	Gemfile.lock
	app/controllers/application_controller.rb
	app/controllers/lists_controller.rb
	app/models/category.rb