* Add. Support `onInterval` method to EventConsumer class
Usage
```Lua
-- execute action each 30 sec
events:onInterval(30*1000, function() end)
-- execute action once after 5 min
events:onIntervalOnce(5*60*1000, function() end)
```
* Fix. Remove timers
* Fix. Reset timer before callback
It allows stop timer inside callback.
Also it produce more accurate interval invocation
if callback take quite a long time.
E.g. Interval = 10 sec and callback took 5 sec then
if we reset timer after this callback then gap between
invocation will be 15 sec.
* Add. Timers now have TimeEvent class type.
Add. `reset` method to IntervalTimer class.
```Lua
events:onIntervalOnce(1000, function(self, timer)
-- timer has type TimeEvent
-- restart timer so it will be invoke again
timer:restart()
-- or reset new interval
-- timer:reset(5000)
end)
```
* Fix. Typo in variable name
1834be5042