2nd round comments on intro addressed.
second draft background.
Merge branch 'master' into background

Conflicts:
	.aspell.en.pws
typo + added words to spell checker dict
addressed 2nd comment on hfile chapter.
Merge branch 'master' into hfile

Conflicts:
	.aspell.en.prepl
	.aspell.en.pws
	statisticalMachineTranslation.tex
includeonly for hfile
addressed 2nd comments posteriors.
Merge branch 'master' into extractionFromPosteriors

Conflicts:
	.aspell.en.prepl
	.aspell.en.pws
	statisticalMachineTranslation.tex
	thesis.tex