#1 Add support for title bar on right side of window

[Peter Zion]

I really like flwm, but it seems very unnatural for me
for the title bar to appear on the left while I use my
mouse on the right side of the keyboard. In addition,
the text on the left-side title bar is written upwards,
whereas books in english write their titles down the
spine; thus, this seems more natual to me as well.

This is a simple patch that creates a configuration
option, TITLE_ON_RIGHT, which puts the title bar on the
right of the window and writes the label down the bar.
Otherwise, flwm functions identically to before.

There is a very slight performance hit for this patch
since show_hide_buttons must now be called whenever the
window size changes.

The patch is against the flwm-1.00 sources that are
part of Debian Sarge.

[Peter Zion]

The patch