Merge pull request #1 from eduardobursa/master

Best practices
Added:
* Commons specifications:
** MustHaveNullOrDefaultPropertySpecification
** MustNotHaveEmptyPropertyTextSpecification
** MustNotHaveNullOrDefaultPropertySpecification
* IGlobalizationResolver
** DefaultGlobalizationResolver
** FuncGlobalizationResolver
* KissSpecificationsConfig
Doc fix.
Common specs improvements.
Updated HelperSharp.
Added MustNotBeNullSpecification.
Added a constructor using Expression.
Update README.md