createWiggle-methods:  Create wiggle track (methods)
Description
 Methods for creating wiggle tracks
Methods
 - x = "missing", y = "missing"
 -  Handle empty function call 
  - x = "ExpressionSet", y = "missing"
 -  Handle input of an object of class 
ExpressionSet. Derive features from FeatureData.   - x = "ExpressionSet", y = "matrix"
 -  Handle input of an object of class 
ExpressionSet. Derive features from matrix input   - x = "vector", y = "matrix"
 -  Handle vector input 
  - x = "matrix", y = "matrix"
 -  Handle matrix input