Change version number to 0.9.3.3-SNAPSHOT
Bug fix in CSVDataLoader

Using the setters did not have any effect since the file was opened in
the constructor before setting the various properties. This commit fixes
this issue.
Release 0.9.3.3

Changed the version number to 0.9.3.3 and updated README.org
Add IntelliJ Idea files to .gitignore