Better exceptions
Better exceptions

* Jesus fucking Christ, Node exceptions are fucked up.
* Improve (and even simplify a bit) exception definition. The code is
  really fishy, but it seems to be the only way to get proper
  exception handling under Node.

robohydra/robohydra,mlev/robohydra,mlev/robohydra,robohydra/robohydra,mlev/robohydra