Upgrade WrapperArgsFactory and WrapperMessage regarding new API.
Fix a bug which prevented the alignment of optional fields
Encoding function should not raise an exception if no content is specified in the field.
First version of NW alignment
Include semantic tags support to AbstractMessages
Merge branch 'feature/newAPI' of dev.netzob.org:netzob into feature/newAPI
Fix a bug which prevented empty columns when DomainEncodingFunction was used