Update watch task to run lint and build on start.

Sometimes I find myself making changes before running the watch task so
need to make sure scripts are clean and rebuilt.
Update project description.
Correct license value.
Update README so its shorter and with better descriptions/examples.
For second multiple lines example use same rows attribute value of 3.
Remove scroll event handling and use $(this).

Not sure why I was using scroll event here. Maybe necessary for IE too?
Either way input event handles all the cases I’m concerned with
entering, deleting, copy and pasting, cutting, etc.