Fix typo in stacks-properties.tex

Thanks to Niels Borne
http://stacks.math.columbia.edu/tag/06MT#comment-965
textit ---> it in non math mode

Thanks to Tim
http://stacks.math.columbia.edu/tag/00CV#comment-967
Fix definition map to localization

Thanks to JuanPablo
http://stacks.math.columbia.edu/tag/00JR#comment-968
Fix typo in simplicial.tex

Thanks to jojo
http://stacks.math.columbia.edu/tag/016G#comment-969
well ordered ---> well-ordered

Thanks to Fred Rohrer
http://stacks.math.columbia.edu/tag/05N1#comment-971
Small changes in examples.tex

Thanks to Johan Commelin
http://stacks.math.columbia.edu/tag/060H#comment-972
http://stacks.math.columbia.edu/tag/060H#comment-973
Add missing 'if'

Thanks to Fred Rohrer
http://stacks.math.columbia.edu/tag/01DN#comment-974