Added generator for different cassandra versions

[matlockx]

[matlockx]

Hi,

this is my proposal. The generator will generate a directory with the name of the cassandra version and a build.sh + adapted Dockerfile from teh templates directory. The build.sh builds the image with a tag according to the cassandra version. All new generated files should be checked in afterwards so that it is always directly rebuildable. What do you think?

Best

Martin

[matlockx]

I also added 'latest' now to the generator + some readme notes.