Added readme with setup instructions

git-svn-id: https://svn.apache.org/repos/asf/directory/studio/branches/studio-tycho@1643717 13f79535-47bb-0310-9956-ffa450edef68
o Fixed a wrong configuration listener
o Added some Javadoc
o Moved some constants to ServerConfigurationEditorPage

git-svn-id: https://svn.apache.org/repos/asf/directory/studio/branches/studio-tycho@1643724 13f79535-47bb-0310-9956-ffa450edef68