replaced twitter with Twitter
minor changes to preliminary study > Twitterminology
git cherry-pick 636a110089cc9c2289507ddaffcb6fc4717e8ecc..f871415f3f46654fc17256d81bafffe03d215f28
Merge branch 'master' of github.com:mcmhav/twilm-report
Merge branch 'prestudy'

Conflicts:
	src/chapter/02-prestudy.tex
	src/chapter/04-design.tex
	src/chapter/99-appendices.tex