Add HTML and JS file for Entity Relationship Diagram
Fix JS file's name
Add CSS file and link everything in HTML
Add boilterplate code
Update .gitignore for Mac OS and Emacs usage
Add data files
Add init functions to ER
Add root node to er.entities.json
Add icons to img/ folder and entities JSON
Process data and render root node
Render all nodes and some links
Move node generation to another function. Abstract node and link pushing for quadrants
Show node name. Add CSS for nodes and text
Update data to show more links
Make line thinner and black
Remove .DS_Store from root
Flip axis for the links to render the bezier curve correctly
Correct y positions of the icons
Add arrow heads on the end

We note which direction in which the node is rendering ie. left or
right. We use this information while rendering the arrow heads, their
offset from the center of the node and their direction too.
Add animation for showing and hiding of node name