some fixes that i need to compile on lubuntu 14.04 and of v0.8.3

hi Gilad, i see you are doing a great job on lpmt, and commiting lots of code recently.

I tried at first to compile your code but got a few errors, which is apparently due to some functions which are no more present in latest OF releaseand have been replaced.

I didn't notice any wrong behaviour with those change, but i must admit i'm not an accurate dev on OF.

In brief, the changes i made were:

ofVideoPlayer.idleMovie() -> ofVideoPlayer.update()
ofVideoGrabber.grabFrame()->ofVideoGrabber.update();

meshHelper.texture -> meshHelper.getTextureRef()    // i must admit i didn't really get that one ...

if you think those mods are not crashing lpmtX code, and are not changing wanted behaviour, could you merge it, as i can compile your latest commits, and try to continue helping if i can?