Merge pull request #1 from jimsiff/master

Add confirmation prompt to zero log argument
Add connect/disconnect methods to otultra2 and send \x11\r on connection.

The otultraeasy requires explicit connect/disconnect so implementing
this before is helpful.
common: fix namedtuple usage to allow for optional parameters.

The otultraeasy does not provide comments or meal indications.
Initial support for OneTouch Ultra Easy glucometers.

The driver is fully functional but requires proper documentation and
testing.
otultra2: move checksum function within otultra2 driver.

The function is not shared with the Ultra Easy and likely not with
other devices either.
Add a note that the Ultra Easy is also known as Ultra Mini.
otultra2: avoid using connect/disconnect to wake up the device.

It seems like the device is very sensible to the reset command.
Merge pull request #1 from Flameeyes/master

11/18/14 Update