Change the logic of checking for dynamic pointcuts

This fix allows to improve the checking for dynamic pointcuts by
supporting logical operators. However, logical pointcuts should also support multiple
arguments for dynamic matching via matches($point, $instance, $args)
Logical pointcuts now support dynamic mathcing too, resolves #159
Merge pull request #180 from lisachenko/bugfix/multiple-dynamic-pointcut

Change the logic of checking for dynamic pointcuts