Cis

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* Extended the definition of the MODIS_L3 plugin to include monthly files.
* Added plugins Aerosol_CCI_L3 and Cloud_CCI_L3 to read Level 3 CCI products.
* Extended the Aeronet plugin to read files from:
* The Version 3 Direct Sun Algorithm,
* The Maritime Aerosol Network,
* All versions of the Spectral Decomposition Algorithm,
* The All_Sites_Times_*.dat files now distributed under the "Download All Sites" link.

Incompatible changes
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* Renamed the plugins Aerosol_CCI and Cloud_CCI to Aerosol_CCI_L2 and Cloud_CCI_L2 to be consistent with MODIS.
* Updated to Iris 2.0.0 and pyHDF 0.9.0 (removing previous workarounds).
* Gridded / gridded collocation of time coordinates is no longer supported since iris no longer allows the
determination of whether a point lies within a bounded region for datetime-like objects

Bugs fixed
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* In a PP file, if a var_name contains spaces the plugin will now attempt to replace them with underscores.

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* Implemented ungridded - ungridded collocation performance improvements (9)
* Improved reading of NCAR-RAF style NetCDF files
* Performance improvement when reading many (100s of) NetCDF files
* Improved support for reading CALIOP L2 data

Bugs fixed
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* In previous versions of CIS cartographic weights were calculated for all collapse operations regardless of the dimensions being collapsed. This may have given unexpected values in some cases. CIS now only calculates weights when collapsing over latitude.
* Plot colourbars are now associated with the plot axes rather than the figure, which makes it easier to make
multi-axes plots with CIS.
* Fixed an issue where `UngriddedData.copy()` didn't copy metadata
* [JASCIS-373] get_variable_names now gets passed the product argument from read_data_list
* Fix 11 by relying on shapely exception which moved
* [JASCIS-375] Ensure the mask is retained when expanding coordinates from 1d to 2d
* The Cloudsat reader no longer expands coordinate arrays for 1-d datasets (such as ice-water path)

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* Minor fix for the info command on Windows

Bug fixes
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* Fixed a (potentially serious) bug in unit parsing which would convert any string to lowercase.
* [JASCIS-367] Make the name() method more consistent between gridded and ungridded data
* Minor fix when reading variables from PP files with spaces in the name