1.18 is a maintenance release

Changes in API

*none*

Implementation

All errors moved to fatal, since there is no easy recovery strategy
Vulnerability fixes on all code
Status check, many functions now check the status when calling other functions.Improved robustness against ill-formed profiles.

Utilities
icctrans: CMYKcm support wrongly implemented, fixed.
icclink: linking 3 to 7 channels didn't work in some cases, fixed.