adds popup functionality to signup button in navbar
abstracts popup function to PopUp factory which can now be called from anywhere in the project
renames signup template for popup and references it correctly in navbar.html
removes old template page for signup popup
(feat) adds popup to signup and login buttons in navbar
removing dependencies
fixes linting errors
Merge pull request #97 from jeffvan576/popup

(feat) adds popup functionality to signup and login buttons in navbar