Build 2021
Add description to pom of projects.
Remove old about usage
Build number and package infos updated for the 2020 build
Add package.info files and update build number value
Replace build.number with buildNumber.properties
Adding documentation to the API and fixing several bugs
Adding the about and the preferences page for the annotation extension
Commit the annotations extension
Adding the extension folder
Share project "org.gvsig.annotation.app" into "https://svn.forge.osor.eu/svn/gvsig-desktop"