memory.memsw.limit_in_bytes & memory.swappiness options support added. simple cli-tool  added

Hi!
I've added cli-tool & support of two cgroups interface options:
- memory.memsw.limit_in_bytes 
- memory.swappiness

cli-tool lets to start command in special cgroup, where eche cgroup name is composed of the three parameters:
--no-swap => swappless
--cpu => _cpu+Percents
--mem => mem+Mb

==> swapless_cpu100_mem50 - the name of the cgroup