small changes, such that process_isimip_data_no_corr also works with …

…Lily's ISIMIP data (#33)

* add new function to process isimip data without correction.

This function might be a bit faster than other function because it does not load all the historical GCM data.
Also, if you have not prprocessed the historical GCM data for the glaciers, you can still process the future data with this function. (I haven't flattened my downscaled data for the past, because I don't expect to use bias correction).

* small changes, such that the function also works with Lily's ISIMIP data

the first variable of the raw data set is taken, instead of specifying the name of the variable because variable names might vary

small changes, such that process_isimip_data_no_corr also works with …

…Lily's ISIMIP data (#33)

* add new function to process isimip data without correction.

This function might be a bit faster than other function because it does not load all the historical GCM data.
Also, if you have not prprocessed the historical GCM data for the glaciers, you can still process the future data with this function. (I haven't flattened my downscaled data for the past, because I don't expect to use bias correction).

* small changes, such that the function also works with Lily's ISIMIP data

the first variable of the raw data set is taken, instead of specifying the name of the variable because variable names might vary