Don't escape tokens in >= 2.1
remove obsolete flush_dir logic
Update INSTALL.md
new_node helper func tweaks

allow specifying DC, and provide the binary interface details too.
Use jna.jar in {CASSANDRA_DIR,DEFAULT_DIR}/lib/
Drop all the extra table creation options - fixes c*-1.2
Test for 6950
Merge branch 'master' of github.com:riptano/cassandra-dtest
Test for 7081
update upgrade test counter testing a bit and misc

allow tests to create their own schema and populate clusters
before the upgrade test is run.
mark base test class as not a test.
run shuffle-create and shuffle-enable on different nodes.
Merge remote-tracking branch 'origin/master' into upgrade_test_fixup
Enable sstablesplit_test in 2.1 and trunk (fixed in #6987)
allow counter update to timeout

....but make sure at least half of the attempted increments actually
happened or fail assertion.
adjust call to upgradesstables.
small debug output addition
Merge remote-tracking branch 'origin/master' into upgrade_test_fixup