exercises on plump ordinals
refer to Taylor's book, clarify injectivity of i_Ord
fix typos in 6.12.1, close #656
errata for d5b2a65
tone down comment about strong normalization, close #649
Fix proof of theorem 7.7.4
fix exercises on colimits, close #655
add index entries
errata for f78d42e
Merge pull request #668 from andrejbauer/master

Replace `\autoref` with `\cref` throughout.
more details in proof of 7.7.4
Merge pull request #669 from KevinQuirin/th774

Fix proof of theorem 7.7.4
fix grammar in 7.7.4
remark on the need for 0-truncation of V after 10.5.5
Merge pull request #673 from mikeshulman/0truncV

remark on the need for 0-truncation of V after 10.5.5
Added a few sentences about and a reference to "Pattern matching without K" in the notes of Chapter 1.
Fixed capital K in reference.
rephrase paragraph(s) about pattern matching in chapter 1 notes
add citation and condense paragraph about for pattern matching
Merge pull request #675 from mikeshulman/without-K

Rewritten pattern matching without K