cleanup
Merge pull request #200 from GeertvanHorrik/master

Added skipIfNotDefined for upcoming Continua CI v1.5
fix error message for GitVersionTask

we dont rely on fody anymore
introduce the concept of Authentication

reduces the use of the Arguments god class
move arguments to the exe

no longer needed in the core
collapse test namespace
add missing test attribute
only perform PerformPreProcessingSteps once per solution instance

fixes #87
should actually verify test output
remove redundant nuget
remove redundant nuget
Added support for NextVersion.txt in GitFlow and dynamic repositories