Quickbook: Merge from trunk.

svn path=/branches/release/tools/quickbook/; revision=76361
Quickbook: Merge windows fix.

svn path=/branches/release/tools/quickbook/; revision=76362
Quickbook: Merge beta version bump.

svn path=/branches/release/tools/quickbook/; revision=76532
Quickbook: Merge heading fix to release.

svn path=/branches/release/tools/quickbook/; revision=76785
Quickbook: Merge from trunk.

svn path=/branches/release/tools/quickbook/; revision=76852
Quickbook: Partial merge from trunk.

- Fixes to 1.6 lists, involving blocks in lists.
- Use anchors for links in documentation, and explicit section ids. Will make
  it easier to edits docs in future.
- Fix filesystem includes.

svn path=/branches/release/tools/quickbook/; revision=77569
Quickbook: Merge from trunk. Fixes #6691, #6794

svn path=/branches/release/tools/quickbook/; revision=78210
Quickbook: Merge documentation fix + version number for release.

svn path=/branches/release/tools/quickbook/; revision=78850
Quickbook: Merge old changelog entries from trunk.

svn path=/branches/release/tools/quickbook/; revision=82576
Merge quickbook to release.

- Use `boost::string_ref`.
- Improved source map handling, unindent for code blocks.

svn path=/branches/release/tools/quickbook/; revision=83133