[IOURT4x] fixed reColor regex stripping whitespaces between words
[PARSER] moved back event mapping logic into Plugin class
[PLUGIN] added possibility to register multiple event hooks for the same event inside a plugin
[TESTS] updated test cases for plugin event registration
[PLUGIN] make old style event registering and new style play nicely together
[CORE] prevent the same plugin to register multiple times for the same event
[EVENTS] use list instead of set to ensure ordering + check for uniqueness before appending
Merge pull request #1 from thomasleveil/event-hooks

Event hooks
Merge pull request #193 from FenixXx/release-1.10

[CORE] plugin events fixes