- drop version specific keywords

- drop version specific url
- let user add links for versions (installation, support, whatever)
- use application description and version description to display version description
- don't provide a link in the cat_path to go in the same page we already are
- various html improvement and fixes in modified lines

tables/appdb_tables.sql

@@ -52,11 +52,7 @@ create table appVersion (
        versionId          int not null auto_increment,
        appId              int not null,
        versionName        varchar(100) not null,
-       keywords           text,
        description        text,
-       webPage            varchar(100),
-       rating_windows     float default 0.0,
-       rating_fake        float default 0.0,
        maintainer_rating  text,
        maintainer_release text,
        key(versionId)