style: add auth template

[gabrielsrs]

##What
Create a login workflow pages and administration panel to manage users, groups and roles.

##Why
To restrict access to endpoints based on login and group roles for each user enabling manage those accesses.

How

• Rename decorators to swap validation between api and app
• Create login, sign up and log out backend structure to handle these actions with JWT
• Split the validate decorator between two (api_release_access and app_release_access) and these decorators call the function (_verify_jwt_and_permissions) with actually validate access
• Create template to login, sign up and log out(nav)
• Create a nav to handle log out, making necessary add function in home and layout templates
• Add roles on return from group and data from created group and role
• Change url from UserAssignGroupResource for coerency
• Create user resource to get user information
• Create backend to manage access
• Create page to rbac functionalities
• Add link on nav to admin users

Issue

resolve #57

[gabrielsrs]

Hi @holysoles, I create the template for login and rbac adm panel, just two things:

• This PR got bigger than I expected, so I made more commits to clarify the purpose, but without body, If you think is better, I can put a description in each one.
• If you prefer, I can split these commits between most PRs.

If you think that is something I can add(or remove), let me know...