Minor comment improvements
Making processor a bit more robust against source files missing in compilation
Merging test classes specified via @WithClasses on method and class level
Issue #79 Adding generics solution for custom mappers
Issue #79 Fixing suggestions
Issue #79 Fixing small error in ArrayType
Issue #79 Fixing @withClasses per test case
#79 Some typo fixes, simplifications and comment improvements
#79 Formatting
#79 Adding Sjaak to copyright.txt file