Remove current_user helper_method
Add Position model
Add Position fields and display on show page
Add Education model
Add general information to LinkedIn
Add relationship to Employee and LinkedIn
Add relationship to Employer and LinkedIn
Create LinkedIn model and save data. Display on employee's profile.

[completes #66643196]
As an employer, I should be able to save a candidate to my favorite list.

[completes #66746410]
Fix seeds, schema, landing page, custom.css conflicts