Migrate to MongoEngine / MongoDB

[sadsfae]

This is a QUADS 2.0 design RFE, dependent upon us first moving from SimpleHTTPServer to CherryPy outlined here:

#140

General Idea

We will want to move away from flat-file management into something that scales better and requires less code to manipulate locking, reading and writing on-disk YAML files.

Moving to Mongoengine ODM will look like:

• Splitting out schedule.yml into separate Mongo documents
  • schedule
  • hosts
  • clouds
• Move /opt/quads/data/stat into Mongo Document
• Move /opt/quads/data/ports/$FQDN_OF_HOSTS files into Mongo document or document(s).

This requires implementation of #140 first.

WIP here: radez@47eb97d

https://github.com/radez/quads/tree/cherrypy

[sadsfae]

Adding in an image created by @grafuls here for class architecture, this is probably the model we want to start looking at when moving to BSON / MongoEngine ORM.

[sadsfae]

This has been in place for quite a well and well-tested in the current master branch, closing this out now.