0.4.1

This is an important bugfix update to 0.4.0 and solves

• gamma correction issue #25 and #26 (thereby removing type SRGB), fix #28
• reading of V3 rps fixed, #30 with #31
• landmarks evaluator: added missing parts to get a working version #27
• remove left-over debris of unfinished segmentation parts, #32

0.4.1 should be preferred over 0.4.0 for all applications.

Remark: Some fixes required removing non-functioning interfaces (e.g. SRGB removed)