Eclipse marketplace entry for Freemarker IDE plugin

As initially proposed at https://github.com/jbosstools/jbosstools-freemarker issues,
just created https://marketplace.eclipse.org/content/freemarker-ide-jboss-tools , it should appear within days.

Note, that this is now the only way for Eclipse to automatically discover and install Editor for .ftl files (and later for .ftlh and .fltx https://github.com/jbosstools/jbosstools-freemarker/pull/62)

Also it makes freemarker plugin searchable on marketplace, so solves new users questions http://stackoverflow.com/questions/9385561/freemarker-eclipse-plug-in