64bit inline asm

Add 64bit asm code for Linux and Darwin to the functions that already
have darwin32 code.
A quick little fix or this #if won't work correctly
Sligth modifications as per suggestions from breznak
Unify linux64 and darwin64 cpuid

Shouldn't have been saving the id directly to a memory location.
Merge remote branch 'upstream/master' into 64bit-asm
Spatial Pooler Doc Update
Spatial Pooler Doc Update
Spatial Pooler Doc Update
Spatial Pooler Doc Update
Spatial Pooler Doc Update
Improve doc of types
Doxyfile tweaks: fix casing and enable STL support
Style tweaks for <code>
Doc the log levels
Fix `i.e.`s that break brief docs
Style tweaks for <em>
Travis trigger
Merge pull request #102 from utensil/80-engine-api-doc

Improve `engine` API doc: Types and misc
Merge remote branch 'upstream/master' into 64bit-asm
Merge branch 'master' of github.com:numenta/nupic.core into SpatialPoolerDoc

Conflicts:
	Doxyfile