DiamondLightSource/Savu: Version 2.1

Core Updates: Adds numpy backend for basic (same pattern) processing Framework restructuring to expose local and global slicing methods Allows multiple plugins to process 'raw' data Adds beamline logger for auto-processing Adds 'nprocs' option to previewing Fixes 'File write failed' error caused by ROMIO 2GB read/write limit and h5py create_dataset Replaces h5py create_dataset (with chunking) with direct hdf5 calls, to avoid initialisation of the created file. Updates configurator arg parser to allow negative values in a list Adds beginnings of a GUI for creating plugin templates Plugin Updates: Adds iterative plugin driver Adds iterative vo_centering plugin Adds edfsaver Improves vo_centering Fixes scikitimage to use values from parameters Fixes error in upper and lower bounds for darkandflatfieldcorrection Fixes distortion correction Fixes previewing and parameter tuning at the same time in reconstruction methods Improves all reconstruction wrappers: Improves astra toolbox wrappers Improves base recon and centre/outer padding Padding is now only allowed for suitable methods (e.g. yes for FBP but no for iterative methods