Updated the Super-CSV jar to 2.1.0

The old one was no longer available for download
so the build script failed.

It now depends on 2.1.0 which is available and
should be for some time
Correctly exported the Sources jar

Since they are now separate, I needed to export
the sources jar. Unfortunately I did it wrong so
now I am fixing that.
Made the ant build run properly

For some reason it was not. Now it does
An API class was renamed in Super-CSV

The name is now with lower cases… Anyway, I went
ahead and renamed it here as well
Updating the code for the new SuperCSV api

The getCSVHeader was renamed simply getHeader. Updated
the code to reflect that
Removed 2 useless null pointer checks

Also, the Java 7 compiler was giving error because of
them. So I went ahead and removed them.
Updated the plugins to use Java 1.7

Now they should build nicely.
API filters so that the bundle verifier does not complain