logging, prescribed-phys, C-balance fixes, spread logic, thread-fix, parameters

This tag contains several science updates, bug fixes and API changes.
The logging module was introduced
A namelist parameter use_logging is expected from the host land model*
A prescribed physiology mode was introduced, NPP is prescribed and photosynthesis/respiration is ignored
Bug fixes were applied to carbon accounting and calculation of leaf biomass
Modifications were made to the calculation of canopy spread, shifting it to the site level
Various updates to parameters, names, values and metadata, see fates_params_2troppftclones.c171010

This tag is compatible with fates-clm clm4_5_15_r234_v1.1.0_fatesAPI_v3.0.0
*This tag is NOT backwards compatible with clm4_5_15_r234_v1.1.0_fatesAPI_v2.0.0