More jbstyle hacks.
More jbstyle hacks.

* dpy/compiler/incgen.py

  - Add "import runtimelib" if jbstyle.

  - Use "runtimelib.Set" instead of "set" if jbstyle.

  - Don't use GeneratorExpr if jbstyle.

mayli/DistAlgo,mayli/DistAlgo,sghosh1991/distalgo,sghosh1991/distalgo