Now double-click+dragging automatically snaps both ends to word boundaries
(unless on series of spaces), and triple-click selects whole lines.
As a side effect, snapping now occurs on button press, not button release
like it previously was, but I hope that won't be inconvenient for anyone.

Signed-off-by: Christoph Lohmann <20h@r-36.net>

Now, when you are selecting a region, you will get all empty lines that happen
to be in it, including trailing ones. Last line terminator is omitted as it previously
was, though.

Signed-off-by: Christoph Lohmann <20h@r-36.net>

Now, newly allocated Glyphs are set to spaces and current cursor colors
with tclearregion() routine.

Signed-off-by: Christoph Lohmann <20h@r-36.net>

Signed-off-by: Christoph Lohmann <20h@r-36.net>

Signed-off-by: Christoph Lohmann <20h@r-36.net>

To have a more visible cursor on unfocused windows this patch makes st draw a
rectangle around the terminal cell.

Thanks Mark Hills <mark@xwax.org> for the suggestion!

The copying and pasting in the terminald and GUI world is flawed. Due to the
discussion on the mailinglist it seems that sending '\n' is what GUIs expect
and '\r' what terminal applications want. St now implements that behaviour.

Thanks to stargrave@stargrave.org for the suggestion!

People sending me patches against strange revisions and basing on their own
revisions make me having to reapply them. Then such errors appear.

Thanks Alexander Sedov <alex0player@gmail.com> for noticing this.

Thanks Bobby Powers <bobbypowers@gmail.com> for noticing this!

Thanks for the hint from Alexander Sedov <alex0player@gmail.com>!

Thanks "Roberto E. Vargas Caballero" <k0ga@shike2.com> for the comments!

Thanks Mantas Mikulėnas <grawity@gmail.com> for the patch!

Thanks Alexander Sedov <alex0player@gmail.com> for the title patch!

Thanks Alexander Sedov <alex0player@gmail.com>!

Signed-off-by: Christoph Lohmann <20h@r-36.net>

Thanks Alexander Sedov <alex0player@gmail.com>!

The specified font[] pattern need not have a medium weight. It could be
specified as a number too or have a different weight other than medium.

Signed-off-by: Christoph Lohmann <20h@r-36.net>

Thanks Alexander Sedov <alex0player@gmail.com> for finding this!

Thanks Mihail Zenkov <mihail.zenkov@gmail.com> for giving the hint!

Thanks Egmont Koblinger <egmont@gmail.com> for noticing this!

Thanks Jens Nyberg <jens.nyberg@gmail.com>!

Thanks Stephen Caraher <moskvax@gmail.com>!

This also applies some style fixes and handles some old blink codes.

Thanks Egmont Koblinger <egmont@gmail.com>!