Re-write core class

- Place add_filter in a __construct class (possibly better since this
our main instruction to Wordpress)
- Remove named anchor insertion
- Rename some functions
- Separate out insertID from insertAnchor, since these actions happen
at different points
Remove anchor prefix field
New draft complete
Add title tag to anchor for extra clarity
Remove if admin check (not necessary for hooks that only fire if admin anyway)
Change is_single() to is_singular() to allow deep linking on pages too
Add JS and CSS for a more SayIt-style UI
Add $ for jQuery
Add option for styling highlight in the back end
Merge pull request #3 from strangerpixel/master

Re-write / reboot