intel-ref -- Look up identifiers in intel's instruction reference PDFs

Intent is to map this to a lookup key in Vim so pressing that key launches the
PDF reader with the instruction up on the screen. Intel made the
searching/jumping impossible by splitting the instruction set into two PDFs.

Setup:

1. Install the Skim PDF reader
2. Download Intel's two instruction manuals A-M and N-Z.
3. Place the PDFs in this directory, call them intelref_am.pdf, intelref_nz.pdf

Usage: intel-ref.py intel-ref.txt <instruction>