adding some documentation
adding some documentation

git-svn-id: 5d698bddc475ee997f11e086d3ffe0819a235235@7425 52ab4f32-60fc-0310-b215-8acea882cd1b

mojohaus/versions-maven-plugin,petr-ujezdsky/versions-maven-plugin,petr-ujezdsky/versions-maven-plugin-1,bcalmac/branch-maven-plugin,mojohaus/versions-maven-plugin,HelloWallet/versions-maven-plugin,mohanaraosv/versions-maven-plugin,prostagma/versions-maven-plugin,tomerc/versions-maven-plugin