This saves 1% of string allocation / destruction on startup.

Based on a patch from Arnaud Versini
(http://lists.freedesktop.org/archives/libreoffice/2012-April/029240.html)

Avoid ref/unref pair in makeStringAndClear, hook into the
stringbuffer-like 'String' class to expose it's conversion to
immutable strings, and fixup misc. missing instrumentation.

If we have a postponed page break and it's sent to dmapper during a new
inner group, we'll still have the page break request after the parser
state is popped, leading to duplicated page breaks. Instead of the
earlier workaround, just send the proper token to the domain mapper, and
it'll handle it properly.

Currently plays the embedded audio files.
The image for the audio file seems to be
rendered bad, currently.

Especially as it is obvious the grow is unbounded .-)

They should not need any actual UI anyway, and most of them already
pass the option manually.
http://lists.freedesktop.org/archives/libreoffice/2012-March/029109.html

TODO:
add test cases for:
-color import
-different line styles
-...

This needs proper fix. It wasn't noticed because it was created by pipe
before afd5eb1f and last command
succeeded, so make continued even if compilation failed.

There is a reason for that dependency. I will have to come up with
something better later.