fixed none filter button.  now svg.selectAll's the line-category, dels data, exit, removes... when category is null
added graphDirective.js for that one and directives.js for all others
new directive for showing 'add'
add has its own directive + template, completely out of controller + main html now
moved time logic on the controller to the directive's controller
modify is now a directive, in its own template and all
cleaned up index.html and some parts of the directives
renamed a var before i forget
show for adding specific categories. now to add the big big logic behind it to work w/ directive circles.
pseudocode for opacity + size