Revision 1655803

This implements OFBIZ-5312 "Proposal: URL-Generation Changes (mostly for SEO reasons but not only)" by merging the "SEO branch" in trunk

After some efforts to take into consideration Anil's justified concerns (simply put: keep the current behaviour), the modifications are finally light, which is greater for reviews. Most important are:
* Product component
  ** I have moved the OfbizCatalogAltUrlTransform and OfbizCatalogUrlTransform classes to a ftl subdirectory with the new FTL macros implementation: CatalogAltUrlSeoTransform, CatalogUrlSeoFilter, CatalogAltUrlSeoTransform, CatalogUrlSeoTransform, SeoTransform, UrlRegexpTransform
  ** A bunch of new filters have been added CatalogUrlSeoFilter, controlServlet, SeoCatalogUrlServlet, SeoContentUrlFilter, SeoContextFilter, SeoControlServlet, UrlRegexpContextFilter
  ** 2 util classes: SeoConfigUtil, SeoUrlUtil
  ** By default ofbizCatalogAltUrl and ofbizCatalogUrl macros now use the new implementations by CatalogAltUrlSeoTransform and CatalogUrlSeoTransform. This can be changed back in freemarkerTransforms.properties
  ** A SeoConfig.xml file define some SEO parameters, the SeoConfig.xsd can be sued as documentation, globally please refer to OFBIZ-5312.
* Framework webapp component
  ** By default ofbizUrl macro now uses the new implementations by UrlRegexpTransform. This can be changed back in freemarkerTransforms.properties
* Ecommerce component
  ** A new ecomseo webapp clones the ecommerce webapp on the model of ecomclone. There is not much there: mostly a controller with a new JspViewHandler class (in ecommerce) and a web.xml file

With these changes we can have both worlds running side by side. So you can use eitherb http://localhost:8080/ecommerce/control/main as root or http://localhost:8080/ecomseo, but also if you want http://localhost:8080/ecommerce/. Then everything follows.

From my reviews and tests all is working as expected. I only found a trivial bug that I can also reproduce in current trunk see OFBIZ-5305 (sometimes not locally, weird).

Of course, all the tests passes.