Capitalise proper nouns in reference titles
Mathify omega in reference "Weak omega-categor..."
Merge pull request #692 from bjmprice/master

Capitalise proper nouns in reference titles
sigma instead of exists in the proof of 10.5.8.(ix)
Merge pull request #694 from jledent/sigma

sigma instead of exists in the proof of 10.5.8.(ix)
Fix typo

Makes it way easier to read the sentence.
Add some style
Merge pull request #695 from kirelagin/patch-1

Fix typo
Merge pull request #696 from kirelagin/patch-2

Add some style
Correction in proof of Thm 4.9.4
Errata for 2c194835, unmarked
Merge pull request #697 from TimRichter/proof494

Proof494