Fix of System.console null on Windows.
Merge branch 'master' of https://github.com/scd4j/gradle-plugins.git

Conflicts:
	scd4j/src/main/groovy/com/datamaio/scd4j/gradle/Scd4jTask.groovy
Merge branch 'master' of https://github.com/scd4j/gradle-plugins.git
Unit tests for WindowsCommand.
Merge branch 'master' of https://github.com/scd4j/gradle-plugins.git
Merge branch 'master' of https://github.com/scd4j/gradle-plugins.git
Unit tests for WindowsCommand.