#159054000 Build out auth mockups

[Duncanian]

What does this PR do?

Create authentication mockup

Description of Task to be completed?

• Create a signin with social networks page
• Create a signin with email page
• Create a signup with email page

How should this be manually tested?

Follow the guidelines provided on the mockup.md file

Any background context you want to provide?

None

What are the relevant pivotal tracker stories?

#159054000

Screenshots (if appropriate)

Social signin page

Signin with email page

Signup page

[coveralls]

Coverage remained the same at 88.158% when pulling 3f08706 on auth-mockup-159054000 into 50ffa85 on develop.

[jacksono]

@Duncanian , @denniswanjiru remember to always format your PR description following the convention we agreed on.

[Duncanian]

I will be implementing my PRs with the PR description Dennis has used as it gives more details on the PR. Good description @denniswanjiru