Design the fontman server API

[malintha]

The fontman API is used to establish the communication between the fontman client and the fontman server. The REST API needs to be spec compliant and concrete. This initial release must cover the following scenarios.

• Get the list of fonts subscribed by the user

• Get a font by font ID

• Get a list of fonts with updates

• Unsubscribe/Subscribe to a channel

• Add a font to the registry

• Add an update to the font

• Add a channel to the registry

• remove a channel

• remove a font

• Add a new user

• Update user profile

• Authenticate user

• Logout a user

• Token renewal

[lpsandaruwan]

API v1Alpha - https://docs.google.com/spreadsheets/d/1nQW0X18Oz7tz3Zo5eeXRPyYc7wtoCVOAzoN910GYd-Y/edit?usp=sharing