Closes issue #23 - store login details

[sahilcc7]

This pull request closes issue #23 - saves login details on sign in based on a checkbox. Credentials are encrypted and stored locally.

Files changed:

• app/components/authenticate.component.js
• app/components/authenticate.component.ts
• app/misc/authenticate.js
• app/misc/authenticate.ts
• app/misc/readCredentials.js
• app/misc/readCredentials.ts
• app/misc/router.js
• app/misc/router.ts
• app/misc/storeCredentials.js
• app/misc/storeCredentials.ts
• index.html

[kzy618]

tested, it is fine

[softeng-701]

This and https://github.com/kblincoe/VisualGit_SE701_3/pull/110 should be reverted but there are conflicts, needs to be followed up