Changes

Clubb driver upgrades (#1225)

* Moving stuff around in preparation for preparation for GPUization

* Small modifications, adding explicit loops

* Small bug fix and explicit loop additions

* Removing ngrdcol dimension from initialize_clubb, essentially reverting changes.

* Removing array slicing by using local variables of nzm/nzt dim

* GPUization of initialization variables

* Removing need for single_col versions of the pdf_params, this (weirdly) saves a huge amount of runtime

* Adding comment

* Adding 2D version of various routines, including initialize_clubb, but only calling initialize_clubb with 1 column.

* Fixes to make work with latest clubb changes

* Merging with master