Install postgresql gem

Also set up database in dummy application.

Signed-off-by: Joan Tiffany Siy <joan@teamcodeflux.com>
Add devise gem

For security and user control.

Signed-off-by: Joan Tiffany Siy <joan@teamcodeflux.com>
Set up devise for a mountable Rails engine

Based on the article found in:
https://github.com/plataformatec/devise/wiki/How-To:-Use-devise-inside-a-mountable-engine

Signed-off-by: Joan Tiffany Siy <joan@teamcodeflux.com>
Create the user model

Generate the User model via devise and add first name
and last name fields.

Signed-off-by: Joan Tiffany Siy <joan@teamcodeflux.com>