Bugs in the Frontal ablation calibration ( Advanced Test- Tidewater Glaciers)

[Ruitangtang]

Hi David,

 I got errors when doing the first step, `python run_calibration.py -option_parallels=0`, of Frontal ablation calibration (Advanced Test- Tidewater Glaciers).  

  Here is the error information:

  `pygem.shop.mbdata: AssertionError occurred during task mb_df_to_gdir on RGI60-01.03622: mb_clim_mwea not a column in mb_df`

   Actually there is no column named mb_clim_mwea in the file **df_pergla_global_20yr-filled.csv**.  I am wondering if `mb_clim_mwea = mb_mwea`, under this situation?    If yes, another condition statement might be needed in the  ~  Line191-196,  Or?


    Besides a typo error, in the manual  "Update datasets and recalibrate model parameters", 

     update the pygem_input.py, might be `hugonnet_fn = ‘df_pergla_global_20yr-filled-facorrected.csv`’ not `hugonnet_fn = ‘df_pergla_global_20yr-filled-FAcorrected.csv’

`

[btobers]

This issue would have been resolved upon the release of PyGEM v1. The advanced test tidewater example was converted to a Jupyter notebook in PyGEM-notebooks repo, and the advanced_test_tw.ipynb test is now run automatically after PR #78.