Added reference to the official documentation

git-svn-id: http://jira.uji.es/repos/uji/CRYPTOAPPLET/trunk@20161 e6edf6fb-f266-4316-afb4-e53d95876a76
Logo for README.md docs

git-svn-id: http://jira.uji.es/repos/uji/CRYPTOAPPLET/trunk@20162 e6edf6fb-f266-4316-afb4-e53d95876a76