Blender Git Loki

More text object fancyness, and fixes:

- "Flush" is now split into two seperate Alignment modes "Flush" and
"Justify":

- Justify does exactly the same as a normal word processor's justify
function does, and in addition, it uses *whitespace* instead of
*character spacing* (kerning) to fill lines. Much more readable.

- Flush is pretty much the old Blender "Flush" mode - and as such it
uses character spacing to fill lines. Just as Justify, this only
works with at least one textframe.

- Underlining for text objects. Not a lot to explain. New button "U" in
the editbuttons, and CTRL-U as hotkey toggle underlining for newly
entered characters or for the selection, just like CTRL-B/CTRL-I do for
bold/italic.

Underline height (thickness) and Underline position (vertical) can be
set in the editbuttons.

Implemented as CU_POLY polygon curves.

- The B, U and i buttons (and the corresponding CTRL-B/U/I keystrokes)
have been fixed to only affect *one* attribute at a time. Formerly,
hitting CTRL-B when no other style was active, on a text portion with
italics text, for example, would kill the italics and just apply bold.

Now, these attributes always add or substract only, but do not
replace the style.

- In the past, there were bugs with material indices uninitialized, and
thus crashes in the renderer with illegal material indices.

Even though I assume they have been fixed, I've put in a check that
checks (hah) if the material index of a character is illegal (bigger
than ob->totcol), and then sets it to zero, and spits out a warning
on stderr.

If you see such warnings, please report and link to the .blend.

- Bugfix: All alignment modes only worked if there were at least *two*
lines of text in the text object. Fixed


There's now a regression test file for text objects, please add to the
corresponding repository:

http://blender.instinctive.de/downloads/release/demo/text-regression.blend.gz