Memsql-collectd

* Switching to timezone invariant support for Ops 2.10.0 and above
* Allow user to help the plugin find the correct MemSQL node

* Fixed a bug in the multi inserts

* Upgrade to memsql-python 2.9.0

* Track more memsql values as counters
* Allow override for node detection
* Print version number at startup

* Added config which disables counter/derive derivatives.
* Added classifier blacklist functionality
* Blacklist certain tmpfs's by default
* /dev/shm, /dev, /run, /run/lock, /run/shm, /proc

* Implemented prefix support
* This will prefix all metrics sent with the specified string