Automate SASL provider detection
[ELY-104] base 64 methods should not throw IllegalKeySpecException
Merge pull request #77 from dmlloyd/ely-104

[ELY-104] base 64 methods should not throw IllegalKeySpecException
Merge pull request #74 from dmlloyd/sasl-detect

Automate SASL provider detection
Add a DER encoder and decoder