add a tox target to randomize tests
add several new x509 test vectors
add pyasn1 as a dependency
add decode_rfc6979_signature helper for DSA/ECDSA
add encode_rfc6979_signature and refactor tests to use it
add changelog entry
update docs to fix #1481
Merge pull request #1504 from reaperhulk/update-bindings-dev-docs

Update dev docs to add information regarding recompilation
error if signature has trailing bytes
assign tuple to multiple vars for better readability
Change the envvar for tox env to the officla tox one
Merge pull request #1509 from alex/tox-env

Change the envvar for tox env to the officla tox one
Add various bits useful when generating X509 certs
Merge pull request #1510 from public/more-x509

Add various bits useful when generating X509 certs
OpenSSL binding: add support for NETSCAPE_SPKI_b64_decode
Merge pull request #1511 from delroth/master

OpenSSL binding: add support for NETSCAPE_SPKI_b64_decode
catch PyAsn1Error when decoding rfc6979 signature
add comment describing how the ASN.1 sequence in a test is invalid
Merge pull request #1491 from reaperhulk/randomize-tests

add a tox target to randomize tests
catch PyAsn1Error for encoding signature as well