Added filters to the event monitor
* Filters are specified on the end of /whatis eventmonitor <event>
<ticks>
* Format is [<name>=<value>, <name>=<value>, ...]
* Can also use <name>!=<value>
* Despite symbol, it is not an equals, but rather contains
* <name> is the name of a variable to check
* There are special names too:
  @plugin the name of the handlers plugin
  @listener the class name of the listener
  @priroty the priority of the handler
  @ignorecancel true or false, whether the handler ignores canceled
events