Support hours, minutes and seconds in the temperature profile

[elcojacobs]

The temperature profile has a start date and a couple of set points with an offset from the start date in days.

Having to calculate back to days from hours is not practical, especially on shorter periods that are used when mashing.

We should support input like "1d12h10m".

[lukepower]

Hi Elco,

I just made a commit (damnit, never used Git, hope I didn't broke anything) with a function which should calculate exactly this. It is, however, not being called as of now, but should simply be placed there to parse the string...