flyingf3: raised stack size of eventdispatcher from 130 to 256 words
Rationale behind 130 was that it is the setting which works for CopterControl.
Turns out that it is too tight for FlyingF3.
Merge pull request #401 from lilvinz/eventdispatcher_stacksize

flyingf3: raised stack size of eventdispatcher from 130 to 256 words