Add classes to test assertions generator.
fix warnings
Generate assertions classes in src/test/java but ignore them in git
Add Map assertion example : hasSameSizeAs(Map)
Generate assertions in target/generated-test-sources/assertj-assertions instead of src/test/java to ease removing generated classes
add classes to test https://github.com/joel-costigliola/assertj-assertions-generator/issues/27
Add classes to test bugfix
add hasSameElementsAs assertion example
add haveAtLeastOne assertion example
Example of iterable assertion extracting null nested properties
Add example extension of existing standard Assertion (BigDecimalAssert)
Add examples for type safe Extractors