Updates for release of hotfix/VIC_4.1.2.h:

src/output_list_utils.c: moved from samples/ to src/ where it belongs.
src/initialize_atmos.c: Homero's original fix turned out to have an error, which I fixed.
src/calc_root_fraction.c, src/mtclim_vic.c, src/mtclim_wrapper.c: added comments describing modifications; not sure if this is necessary anymore but did it just to be safe and consistent with past practices.
src/global.h: Updated release version string.
Merge branches 'master' and 'hotfix/VIC_4.1.2.h'
Fix.
Updated to summarize the bug fixes contained in this hotfix.
Merge pull request #10 from tbohn/hotfix/VIC_4.1.2.h

Hotfix/vic 4.1.2.h