0.8.0

[ENH] SoftiMax HDF5 reader
[ENH] 4+ Angle Polarisation widget and Hyper Spectra vector plot
[ENH] HyperSpectra: move image properties to control area
[ENH] Speedup 2D COS widget
[ENH] Perkin Elmer file reader
[FIX] HyperSpectra: fix changing data with active line trace