More changes to ready the Item Forge.

- Changed title to D3 Assistant.
- Refactored site CSS.
- Moved my name to author meta tag.
- Added description tags to home, hero, and item forge.
- Updated image process for CSS item background effect images.
- Added effect background to item tool-tip CSS.
- Added more styles to the tool-tip CSS file.
- Added URL to README file.
- Added tool-tip template.
- Updated site and tool-tip styles.
- Updated TODO list.