Added
Initial Commit
Revamped on/off ranges, Fixed monthly means, changed timeframes

On and off ranges are now optional and include upper and lower bounds
Monthly means were nans if they included days without cycles
Default start time is now launch
Only plot event if it exists (otherwise x-axis was off)
Commented out duty cycle plot using step function
Resurrected other duty cycle plot
Added zoom-in on last 60 days of accumuluated htr pwr plot
Added other thruster valve runs