Initial commit of Cassandra run script.
Bringing up Cassandra cluster works now.
Initial checkin of YCSB, some tidying up to Cassandra run script.
Support disabling submodules when compiling YCSB.
Loading YCSB data works now + improvements to Cassandra run script.
YCSB and Cassandra now working (fixed problem with hosts parameter for YCSB).
Add initial README.md files for Cassandra and YCSB.