intro revision
Merge branch 'master' of https://github.com/colinbdclark/flocking-papers
Merge branch 'master' of https://github.com/colinbdclark/flocking-papers
added references and integrated screenshots
resolved conflict
Merge remote-tracking branch 'drart/master'

* drart/master:
  added references and integrated screenshots
  intro revision
More edits. Added new playground images. Expanded the scheduler section.