hello world!
Parser: added support for --option=value
Parser: options with specified VALUE are optional
Parser: arguments are expected after aliases
Parser::isEmpty() uses argv instead of argc
Parser: accepts parameters with dash like --coverage-src
Parser: added support for enumerated option

Option specified as '-p <a|b>' must be 'a' or 'b'.
Option specified as '-p [a|b]' must be 'a' or 'b' or without value.