Adds d3 library
Creates basic index page
Adds vim swap files to ignore list
Adds demo data set to create <p> elements
Adds style modifiers to selector
Implements function for style argument
Changes display from paragraphs to bars

Adds external stylesheet for bars
Modulates bar height by data value
Moves bar graph example to own directory

Each example ought to be sequestered into its own directory to avoid
having to modify external files for each example
Prettifies bar graph