Branch development version of quickbook.

[SVN r53325]
Update quickbook version number.

[SVN r53447]
Create entry for 1.5 in the change log.

Starting it of with some of the changes that have been made to quickbook
since 1.4 - considering the first 1.4 release as the proper 1.4 release.

[SVN r53448]
Wrap the template info in a struct.

So that I can add extra scoping info.

[SVN r53449]
Add a couple of tests for quickbook 1.4 behaviour to try to preserve it.

[SVN r53450]
Implement static/lexical scoping for 1.5. Refs #2034.

[SVN r53451]
Move all the syntax highlighting code into a single class.

[SVN r53452]
Move the code actions a bit later in actions.hpp so they can use 'plain_char_action'.

[SVN r53453]
Teletype source mode. Refs #1202.

[SVN r53454]
Make sure that a template expansion ends with a ']'.

{{{
[template foo 1]
[fool]
}}}

was generating `1[fool]` - the template would be expanded but then when it
didn't match the `]` it would fail and just get copied to the output. This
change checks for `]` before expanding the template. So it now generates
`[fool]` which is an improvement.

I'm not including a version switch as I see this as a plain bug fix - I can't
imagine this change ever being anything but beneficial.

[SVN r53503]
In quickbook 1.5 don't mix '..' and whitespace seperators for template arguments. Refs #1174

[SVN r53504]
I got a bit confused by this comment, so try to make it clearer.

[SVN r53732]
Put the quickbook version numbers in a single header, along with convenience
functions for using them in spirit grammars.

[SVN r53733]
Ignore spaces after 'section:' for quickbook 1.5+ Refs #2712

And warn when section id is empty after colon.

[SVN r53734]
Introduce temporary id variable.

[SVN r53735]
Table ids. Refs #1194.

[SVN r53736]
Separate out the current version of the template argument parser, as I want to create a new one for 1.5

[SVN r53737]
Don't use seperators that are in brackets, or are escaped. Refs #2036.

[SVN r53738]
Add missing table tests.

[SVN r54137]
Support image attributes. Refs #1157.

[SVN r54138]