Clean up and added features

Basically removed the javascript table from depthbottomtime.php and
moved it into its own table.js to be used by any page.  Created a
separate css file to leave less clutter in the main html page.
Dive Planner

This might be the front page of the web site.
changed layout on data entry

Still trying to figure out how to pass variable to the url so that the
next page can pull the variable from the url and use its data for the
next page.
this html file might be replace with php file

This might not be used anymore since PHP allow me to pass variables to
the url and use it on the final page where we do the calculations.
updated with idea how to make website

look at this page, it shows my thought process on how to make the
website.
with drop down menu
javascript stuff
more hmm
cascade dropdown
updated with new array table
Dropdown list works
Added Scuba Steve

Added Scuba Steve as the instructor for the Dive Table
added warning
Merge pull request #1 from DoDavid/David's-Version

David's version