added abstract and notes for intro
Merge branch 'master' of https://github.com/e5mulder/PhotonInterferenceLab

Conflicts:
	Paper/Photon_Interference.aux
	Paper/Photon_Interference.log
	Paper/Photon_Interference.pdf
	Paper/Photon_Interference.synctex.gz
	Paper/Photon_Interference.tex