Add methods to SiteFilter
Update comment
Add site variables

'refreshRelativeTimes' and 'verbose'
Move default templates to classpath.
Add tag index page.
Update default theme.
Modify RendererImpl

ClassTemplateLoader path: /opoopress/templates ->
/org/opoo/press/templates
Update SiteConfigImpl: can set config.yml file by system property, such as '-Dconfig=config.yml'
Update SiteManagerImpl
Update SiteImpl apply for new site filter.
Update category and tag generators.
Update java sources.