Rollup for the beginning of the v2 development.

* Reimplemented most of the stylesheets in namespace-aware
	* Moved old version into 'old-xsl/' for research purposes
	* About 80% of the old code is implemented in new version
	* Switched to a slightly different method for doing styles and overrides
* Changed `docbook2odf` to allow for single-file selections
	* The old `opf.xsl` is embedded into the executable
* Started to provide some standard formats, such as Standard Manuscript Format.
* Modified image processing to fit more with the content and viewport formulas.
	* Allow scaling of images with only one dimension specified.
	* Allow for images to be anchored to a character or page.
	* Now only picks one supported image and allows for text fallback.
* Switched to use common functionality of the other docbook-xsl-ns namespaces.
	* Requires these stylesheets to be called in a relative directory.
	* TOC generation is controlled via the $generate.toc params.
	* Added custom rule for TOC generation at the end (to support ebook creation).
* Added headers and footers into the stylesheets.
* Added <d:cover/> processing to allow embedding of cover images.
* Added processing (via Makefile) to generate non-namespaced versions.
* Added examples (both namespace and non-namespace) of various features.
* Added <d:legalnotice/> processing to create legal pages for ebooks.
* Nested quotes work properly.
* Examples use `jing` to verify they match DocBook 5 RNG schema.
* Normalized on "d:" for DocBook namespace, uses exclude-prefix to match docbook-xsl-ns.