updating poms for 0.2.1 hotfix
Fix JavaDoc errors

Fix: Resolve many JavaDoc errors (wrong links etc.).
Source & JavaDoc publishing

Add: Sources and JavaDocs are deployed to the maven repository.
Update changelog with source & JavaDoc changes

Note: The changelog contains messages for the resolved JavaDoc errors as well as for the new source & JavaDoc publishing.
updating poms for 0.2.1 hotfix
Merge branch 'hotfix/0.2.1'