LRDOCS-552 Property file to HTML converter

Hi Brian,

Here is the property file HTML converter Jesse (@jrao) and I have been working on. We have it generating desired results for the portal.properties, system.properties, and liferay-plugin-package.properties files. For now, I've just included the classes and template we use to convert singles file.

Not included with this pull request, we have a bundler that builds an index file referencing all of the properties files found in a directory and ant targets for invoking the converter and bundler.

I know this is a large commit of code, so be sure to let us know if we can answer any questions or make modifications.

Thanks,
Jim