Plain Markdown support. Directory support.

* 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.

resources/release/jlp

@@ -0,0 +1 @@
+ng com.jdblabs.jlp.JLPMain --relative-path-root "`pwd`" "$@"