Release 2.11.1

Update zint version to 2.11.0

Version 2.10.0

#147 Datamatrix buffer test from Opaki; encode examples from ISO 16022

Fix EOF issue with output to EMF

Bug reported by <ly_xy@outlook.com>

Static QT build documented

Dotcode: Add custom height setting and format code

Han Xin: Comment possible errors in AIMD-015