add a tox target to randomize tests
add X509Backend support to multibackend
Merge pull request #1496 from reaperhulk/x509-multibackend

X509Backend support in multibackend
Export X509_STORE_load_locations and X509_STORE_set_default_paths functions. They are necessary if you want to verify certificates offline.
Remove stray space
alter vector file loader to support passing read mode
Merge pull request #1500 from vovka-korovka/master

Export X509_STORE_load_locations and X509_STORE_set_default_paths
Merge pull request #1501 from reaperhulk/change-loader

Alter vector file loader to support passing read mode
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