Trim trailing whitespace
Tiny speedup/cleanup
Fix right justification on multi-line paragraph

On a paragraph with multi lines, only the last
line was right aligned. This was due to the fact
that we only looked for a parfillskip as the
second last node (no -10000 penalty for the 'hard'
linebreak).
Speed up pdf comparison (rake qa)

We don't need to recreate the resulting PNG
files if result.pdf is not changed.
Fix multi line centered text

On a paragraph with multi lines, only the last
line was centered. This was due to the fact
that we only looked for a parfillskip as the
second last node (no -10000 penalty for the 'hard'
linebreak).

We now remove everything until the last skip, which
can be a parfillskip or a self introduced
skip by an explicit line break (\n or <br/>)
Schema: allow <ForAll> in <Textblock>
Textblock: width can be a number or a length

Warning: this depends on the 'current grid'. One
day when we have local grids in groups, this
will break. Oh well.
Fix bug on empty row in data

When having a <Paragraph> with <Value select=".">
and data such as <data>foo&#x0A;</data> there
was an error on the empty line (no prev pointer)
decode-html() to convert &lt; into < (and alike)