Update Hydra.js

Change unsuscribeFrom iteration over aChannelEvents to make it in reverse order.
This is done in order to avoid messing with array length when removing items.
Update Hydra.js

Change the iteration over aSuscribers, making a copy of the array to avoid it from crashing when an item is removed from the original array. E.g.: a notification removes its listeners.
Merge pull request #14 from Ramonacus/master

Debug array iterations which may crash