Expectation::matchArg use try/catch exception instead of @ operator
remove testPregMatchThrowsDelimiterWarningWithXdebugScreamTurnedOn test case
Merge pull request #333 from fhinkel/master

Mock->shouldAllowMockingMethod() returns $this instead of null
put preg_match to silent code block if  is not a regex
Merge pull request #330 from lytc/master

Expectation::matchArg use try/catch exception instead of @ operator