Merge pull request #8 from alopezlago/master

Adding Alejandro Lopez-Lago to contributors list.
"Quantizing" node positions in diagram
Center packet submission node
Merge branch 'quantize'
Renaming diagram to components
Consolidating .gitignores
Finish rename
Added class diagram
Factor out \myref and delete duplicate center
Spaces to tabs
Adding divisions, reordering sections
Marking additions not in Jonah's diagram
Add events and questions
Much nicer class diagram layout
Add stages self-loop
Add legend to class diagram
A few details about polymorphism
Neaten class diagram code by defining styles and commenting
Smaller text depth for legend
Added Harry White to contributors