Savu: Version 0.3.0

Release after testing on live beamline data. Core updates: Experimental process lists Improved MPI performance Improvements due to HDF5 chunking Previewing functionality Configuration tool usability enhancements: including plugins on/off Parameter tuning Dimension mapping: 3D time-series to 4D data Clean up of tests/code Restructuring of plugin folders Diagnostics improvements Plugin updates: Distortion correction Raven filter Custom i12 loader sinogram based time-series correction Improved auto centering Improved time-series correction Base recon updates: log on/off, optional data paddin