BLD: addtl includes to build on macosx
Merge pull request #179 from ContinuumIO/includes

BLD: addtl includes to build on macosx
Try alternate builtin type test
Try cmath over math.h (gcc/gcc's stdlib has isfinite weirdness)
Start of transfering dynd architectural overview content into ipython slides
Transcribing content to the ipynb
More transcribing content
Finished transcription of material into ipython revealjs format

Also reviewed/tweaked the material
Rename files directory to fig, because of nbconverter legacy bug

https://github.com/jupyter/nbviewer/issues/370#issuecomment-64872155
Finish section on nested arrmeta
Various edits, add memory block slides