Updated version and nuspec to 1.2.3

bumped version to 1.2.2

added changelog for 1.3.0-aplha.1

Signed-off-by: Sven-Michael Stübe <[email protected]>

Updated version to 1.2.1

version 1.2.0

Updated version to 1.2.0-beta4

Updated versions to 1.2.0-beta3

set version to 1.2.0-beta2

Updated versions to 1.2.0-beta1

Merge branch 'master' into 1.1.0