GitLab

added `syn_ssv` attribute to SuperSegmentationObjects, `init_sso_from_kzip` is now aware of `syn_ssv`, pkl files are now loaded with disabled gc, updated docs

# Conflicts:
#	README.md

added sem. segm. example for compartment prediction (examples/semseg_axon.py), fixed order mis-match between ssd.ssv_ids and arrays loaded from ssd.load_cached_data(..), updated docs

Dense segmentation

Small doc fixes

updated numyp requirements (with numpy 1.16.3 there is an np.load issue probably due to changed default kwargs -> check and fix these for version compatibility)

added semseg_axoness SLURM script and view parameter entry to `global_params.py`, minor improvements

rendering of small and big neuron SSVs is now performed as two distinct (parallel) processes, minor speed improvements (e.g. cache for rotation matrices for index rendering), fixed ImportError `KnossosModule` when using latest nightly build of KNOSSOS