Amending DG example to include custom equivalence class generation transformers (inline and post generation) AND creating alternative SCXMLengine constructor to add CustomTagExtensions

Signed-off-by: Nilkamal Weerasinghe <wnilkamal@yahoo.com>
PMD check fixes and unit tests for POST and INLINE EquivalanceClassTransformer

Signed-off-by: Nilkamal Weerasinghe <wnilkamal@yahoo.com>
Bug fix for Github issue #165 and new equivalance class for 'digits' and 'number'

Signed-off-by: Nilkamal Weerasinghe <wnilkamal@yahoo.com>
Pull request comments incorporation

Signed-off-by: Nilkamal Weerasinghe <wnilkamal@yahoo.com>
Merge pull request #164 from wnilkamal/master

Amend DG example to include custom equivalence class generation transformers (inline and post-model) AND creating alternative SCXMLEngine constructor to add CustomTagExtensions prior to model loading