[documentation] fixed definition and return value type of `me.timer.getTime()`
[#99] the `animationspeed` property now defines delay between frame in milliseconds (as opposed to previously in framecount)
fixed the flying entities animation speed in the platformer example

(following last commit)
[#262] updated the tween implementation to the last official r11 version

Note : this breaks compatiblity, as the  Easing contants `EaseNone`,
`EaseIn`, `EaseOut` and `EaseInOut` have been renamed to `None`, `In`,
`Out` and `InOut`.
[#59] renamed `me.EntityContainer` to 'me.ObjectContainer` and moved it to src/renderable
added in text option for resources loader.