Added possibility to choose between selection methods (single, multi,
radio, check boxes). Right now this does not work for "scriptler"
parameters.
Added choice type chooser to "scriptler" part.
Translated choices and new text.
Adapted test for JSON binding.
Adding the CascadingChoiceParameter option - Madeline.Goss
Ensure scriptler default parameters are considered, in case a parameter has not been explicitly set.
Fixed formatting
Small fixes
Merge branch 'ndeloof-master'
make the choice model backward compatible. The the default type is PT_SINGLE_SELECT.
Merge branch 'pr/11'
Merge branch 'pr/12'

Conflicts:
	src/main/java/com/seitenbau/jenkins/plugins/dynamicparameter/ChoiceParameterDefinition.java
	src/main/java/com/seitenbau/jenkins/plugins/dynamicparameter/scriptler/ScriptlerParameterDefinition.java
#15 remove the check of the actual value from the choice models.
fix test
#8 changed the model remote property type from boolean to Boolean and
add logic for null handling. When remote is null it will return true.
changed the type of the property readonly to Boolean and add null
handling.
add German translation for cascading parameter type.
removed unsed import
#9 add jars to classpath in from classpath folder.
add try catch block for class path handling.
[FIXED JENKINS-18972] use scriptler GroovyScript to run scriptlers,
as it is designed for this purpose.