initial prototype of ruby-graphviz dynamic org charts

still to do:
layout management
printing & sizing
performance
consider d3 graph related layouts (isntead of tree layout) for org context concept, separate from org chart needs
commit of a basic orgchart that can be navigated (graphviz)

dynamic construction of graphviz dot chart
dynamic URLs for navigating structure and showing people details
some more complex and experimental layout edges (commented out for now)
add database.yml to gitignore
stable org chart version allowing naviation from node to node
added work dir to gitignore
cleaned out passwords
readme cleanups
toggle for layers shown in org chart
release notes cleanup