Added the ability to load mapping config from a stream. This can benefit users that do not store configuration from the file system. I refactored the MappingFileReader stream reading capability to expose this function.
dozer/core/src/test/java/org/dozer/functional_tests/InvalidMappingTest.java was expecting an NPE but the test creates a Mapping exception. I corrected this test as it should not generate NPE anymore. The build test is clean now.
added stream based config loading for config not in fs
refactoring the code. will push soon.
InputStream based XML file loading, closes #2;