add SEED to changelog since it was forgotten
RSA encryption support
update changelog
change doctest to codeblock until we add multibackend support for encrypt
determine operation type by isinstance on the key
improve style in test, update docs for rsa encryption review
another style fix in the rsa tests that I missed last time...
Add bindings for DSA_sign and DSA_verify
Merge pull request #967 from skeuomorf/more-bindings

Add bindings for DSA_sign and DSA_verify
move ct length check into decrypt function, address review comments
update some decryption tests
Fix some typos.

Found with https://github.com/intgr/topy/
Merge pull request #968 from alex/typo-fixes

Fix some typos.
Merge pull request #969 from reaperhulk/update-changelog

add SEED to changelog
backend->self in a few places
Fix installation on travis. Curl doesn't follow redirects
Merge pull request #971 from alex/fix-travis-install

Fix installation on travis. Curl doesn't follow redirects
Rename OpenSSLSerializationBackend
Merge pull request #970 from reaperhulk/tiny-fix

backend->self in a few places
Merge pull request #958 from public/openssl-loading-backend-iface

Rename OpenSSLSerializationBackend