Yet more addtions and corrections to the gtk documentation.

What this patch accomplishes:

The following widgets were added to the list:
inputdialog
tooltips
toolbar

The set_focus signal was documented in the gtkwindow widget.

I fixed a buch of typos (lost track of how many)

Added options to most of the widgets that have them and documented the
ones I knew what they did.

Did some work on the initilizing of the library and added a subsection 
on the gtkrc file.

Bitchs, complaints or any blantant lies in the documentation should be
directed to me:

Gregory McLean aka Centove <gregm@randomc.com>

This patch should be applied _after_ my inital patch of 011698. That patch 
is against the released gtk 0.99.2 tree.