Use a 'notebook' for Info vs Profile

Use a 'notebook' for Info vs Profile

I dunno.  This seems a better interface at least if we get more info for
the dive, but I suspect I'll want to the add basic info to the profile
page too.

This makes the 'table' approach to layout be kind of pointless again,
and the table has become a fancy vbox.  Maybe I'll put the core info
back, and use the notebook 'Info' page for extended information.

I should just bite the bullet and start saving the dive data, and adding
editing functions for adding information.  But instead I'm playing
around with random gtk widgets.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>