- source code documentation.
- `.. soucecode::` directive for rst will graciously fail if pygments or
  docutils packages are not installed.
- sub-commands accept -g switch that specifies the layout's configuration
  file.
- Added NewPage subcommand plugin.
- Convertion functions, for various formats are abstracted into library
  functions.
- .ttl templates, plain text and raw-htmls are allowed as page-contents.
- Code refactoring.
- `siteconfig` is passed as settings for IContent, ITemplate and IXContext
  plugins.
- Fixed styling for myblog layout.
- Updated README.rst
Added <title> tag in myblog's _default.ttl template.
Documentation.

--HG--
rename : docs/glossary => docs/glossary.rst
rename : docs/myblog_layout.rst => docs/myblog.rst