Add Taints and Tolerations

[fridim]

This is a big change, not intentionally intended

It originally started by adding the Taint & Toleration feature to AgnosticS.

• Update README: mention Config Git repository, add example
• Fix ansible example to use the scheduler
• Add API_ADDR and CONSOLE_ADDR environment variables to configure the
  listening address of both servers.
• Add a watcher to synchronize taints on the different frontends, using Redis.
• Bump API version to 1.0.2
• Add API endpoints to manipulate Taints (POST/DELETE)
• Add 3 different ways to delete Taints:
  • by using the body with a POST method
  • by using the index of the taint in the cloud (DELETE /taint/{cloudName}/{taintIndex})
  • by deleting all taints from a cloud (DELETE /taints/{cloudName})
• Improve swagger: add examples
• Add Toleration object definition to swagger
• Rename local variables to meaningful names instead of short names like 't'
• Add policy to configuration (git repo). The scheduler looks for
  policy.yaml file that describes the behavior of the scheduler. It
  is similar to the OpenShift scheduler policy configmap.
• Update unit tests to work with the new structure ([]Taint instead of map[string]Taint)
• New object in Redis: taints. Index them by cloud name and save them as
  JSON. Notify other frontends on the taintMQ channel when a change happens.
• All predicates and priorities functions now take []cloud and not a
  map. They should be identical so the order can be changed in the
  policy.yaml config indifferently.
• Update console CSS, small cosmetic changes