* Removed the automatic document table heading based on the document id.
* Fixed the way 'absolute' links were resolved in `Processor`. A leading `/` for
a link passed into `Processor.resolveLink` really means "resolve as if I am
starting from the documentation root."
* Moved the default logging configuration out of the final jar path. This is to
help with environments that have multiple projects in the same classpath and
therefore may have multiple `logback.groovy` configurations loading.
* Tweaked CSS.
* Upgraded build common to version 1.9.
* Updated the release target in build.xml to take advantage of the new features
of common build 1.9. The release target now copies over the libs and release
resources.
* JLPMain now recognises directories in it's input list. It will add all the
files in a given directory to the input list (including files in abitrarily
nested subdirectories).
* Abstracted the parser behavior further. Processor no longer needs to know
about Parboiled ParseRunners and can use non-Parboiled parsers.
* Created the JLPParser interface to support the new parser abstraction.
* JLPPegParser implements the new interface trivially by creating it's own parse
runner and calling it with the input given.
* Added MarkdownParser, which does not actually parse the file, just creates the
bare-bones SourceFile object needed for the generator to emit the Markdown
contents.
