python/bllipparser/ModelFetcher.py: Handle HTTP errors Now when model files are unavailable, the error will at least be reported.
python/bllipparser/ModelFetcher.py: Handle HTTP errors
Now when model files are unavailable, the error will at least be reported.

dmcc/bllip-parser,antimatter15/charniak-emscripten,BLLIP/bllip-parser,antimatter15/charniak-emscripten,BLLIP/bllip-parser,dmcc/bllip-parser,BLLIP/bllip-parser,dmcc/bllip-parser,yv/bllip-parser,antimatter15/charniak-emscripten,antimatter15/charniak-emscripten,yv/bllip-parser,BLLIP/bllip-parser,yv/bllip-parser,antimatter15/charniak-emscripten,yv/bllip-parser,antimatter15/charniak-emscripten,antimatter15/charniak-emscripten,dmcc/bllip-parser,yv/bllip-parser,yv/bllip-parser,antimatter15/charniak-emscripten,BLLIP/bllip-parser,yv/bllip-parser,yv/bllip-parser,antimatter15/charniak-emscripten,BLLIP/bllip-parser,antimatter15/charniak-emscripten,dmcc/bllip-parser,dmcc/bllip-parser,BLLIP/bllip-parser,BLLIP/bllip-parser,dmcc/bllip-parser,dmcc/bllip-parser