Only run during some hours
Hi, It would be great to have a parameter to run nanominer only during some hours.
A simple way to only run it when the cost of energy is lower.

Example
I want to run it during the night and weekend
--start "0 21 * * *" << Starts at 9pm every day.
--stop "0 8 * * 1-5" << Stops every days of the week at 8 am 

It's similar to a "crontab" on linux

or a bit more complex
--action "0 21 * * *, on" : Switch it on
--action "0 8 * * 1-5, off" : Switch it off
--action "0 4 * * *, powerLimits=50" : Run it at 50% starting 4am
--action "0 8 * * *, powerLimits=100" : Run it at 100% starting 8am

