Bugfixes and minor improvements

[arbennett]

This PR is just getting some small updates into a new release. It includes (based on my memory):

• Adds HRU/GRU info to error messages
• Fixes a segfault of mysterious origin when using JRDN snow layering
• Fixes a water balance error w.r.t transpiration
• Fixes the output message to report the correct solution type
• Adds tolerance to balance check in updatState.f90