Rename Transformer to LambdaExmaple
JavaDoc and better names for methods in the example
Show how Predicates had to be implemented before lambda expressions
Better have different notations in one place
Add a comment about the behavior of consumers
Remove unnecessary type declaration
Better names for test methods
Show how method references can be used in the spring jdbc template
Remove unused imports
Add a comment that the example code isn’t ready for production
Merge branch 'lambda-example-cleanup'
Merge branch 'spring-example-rework'