Provide background on asymmetric crypto in index
Merge pull request #1565 from alex/flesh-out-asymmetric-index

Provide background on asymmetric crypto in index
Reduce duplication in the serialization tests -- refs #1564
Merge pull request #1566 from alex/reduce-duplication

Reduce duplication in the serialization tests -- refs #1564
consolidate dsa serialization loading tests and improve verifier
parametrize some more serialization tests
Merge pull request #1568 from reaperhulk/consolidate-even-more

parametrize some more serialization tests
Merge pull request #1567 from reaperhulk/consolidate-more

consolidate dsa serialization loading tests and improve verifier
add pypy3 to build matrix

excluding on linux until the ubuntu ppa has it
also exclude 0.9.8 pypy3 on linux for now
add a comment explaining why we're excluding pypy3 on linux
don't do coverage under pypy3
Combined duplicated serialization tests
Merge pull request #1571 from reaperhulk/add-pypy3

add pypy3 to build matrix
Merge pull request #1572 from alex/delete-duplicate

Combined duplicated serialization tests
final cleanup for PEM serialization
add both types of EC key formats to parametrized test
Merge pull request #1570 from reaperhulk/final-consolidation

final cleanup for PEM serialization
who can remember where all these files belong? nobody.
Merge pull request #1574 from reaperhulk/license-files-are-hard

Add missing license files to the cryptography_vectors