Merge pull request #87 from mikey179/master

work for 3.5.1
Merge pull request #88 from mikey179/master

added net\stubbles\lang\types\datespan\Month::fromString() to create an ...
Merge pull request #89 from mikey179/master

fixed PHP error when calling net\stubbles\lang\types\datespan\Month::fromString() with invalid value
minor improvements