add d3.js
add user controller and view stubs for d3 testing
add layout and sprockets requirements for testing d3
add additional ancillary materials for data visualization
add initial force-directed graph with collapsible hierarchy
add multi-focus force layout for all categories of literature
Merge branch 'master' of https://github.com/purple-martins-2013/storyward into d3_experiment
add collapsible reingold tree
Merge branch 'd3_experiment' of https://github.com/purple-martins-2013/storyward into d3_experiment
add css and index view modifications for testing of additional visualizations
add circular tree visualization
add sunburst visualization
add zoom to force graph
add zoom to force_group visualization
add zoom to collapsible tree
merge conflict resolved
add seed file
resolve merge conflict in routes
add seeding for nodes and stories
resolve merge conflicts