Control section of Histosols and Histels

[brownag]

will close #133

Items to resolve:

• [ ] How to handle the actual "mineral" PSCS component for families of Terric subgroups? Possibly this is more detailed than the control section key/function needs to cover
• [ ] Add examples that use the O-horizon-related rules and Organic specific limits (i.e "W" and "ff" horizon designations)

[dylanbeaudette]

Did you want this in 2.0?

[brownag]

Did you want this in 2.0?

If it is finished in time then it would be fine to include it, but I wouldn't say it is necessary to include. These soils (Histosols, Histels) are already minimally handled by a prior patch that is already on master branch.

[dylanbeaudette]

ok, no rush. but I'm going to try for this week.