getOrientationHist implemented
style fixes
normalised orientation hist
changed edge handling
Merge branch 'master' of https://github.com/sshihata/Cybernetic-Eye into ft/orient_hist

Conflicts:
	include/globals.h
	include/sift.h
	src/main.cpp
	src/sift.cpp
Removed comments stopping image previews
Merge remote-tracking branch 'origin/ft/orient_hist' into ft/sift

Conflicts:
	include/sift.h
	src/main.cpp
	src/sift.cpp
reduced sigma for blurring of upsampled image