Base basal rate, TBR, last bolus are redundant, they're already displayed on the overview
and the treatment tab. When they're not in sync, that's an error of the ComboPlugin.
* Add info about last command ran to the Combo tab
* Don't refresh data more than once a minute.
* Specify not only error, but also command that raised the error in
alert notification
* Make command execution (RuffyScripter/ComoboPlugin.runCommand) more robust (I still suck at threading).
* Return all possible states in PumpState
* Add absolute TBR to PumpState
* Add NoOpCommand to fetch state data from pump
* Display returned pump state in Combo fragment/tab.
