create-gvsig-portable: Initial import
Adds to .gitignore the projects that are in the release and not in the repo

There are projects that are included in the releases, so they are added to
the workspace but are not uploaded to the repo
extGIA: Refactor config.xml for automatice releases
extGEX: Refactor config.xml for automatice releases
extAudasaCommons: Refactor config.xml for automatice releases
extPM: Refactor config.xml for automatice releases
create-gvsig-portable: Refactor config.xml in gvSIG projects
create-gvsig-portable: Configuration for SIGA