added simple license agreements to Redmine API and Task Adapter projects.
added simple license agreements to Redmine API and Task Adapter projects.

taskadapter/redmine-java-api,sleroy/redmine-java-api,redminenb/redmine-java-api,taskadapter/redmine-java-api,Wurmy/My_Redmine-Java-API_XML,redminenb/redmine-java-api,sleroy/redmine-java-api,stephenc/redmine-java-api