Update documentation for multiget to address #313.
Merge pull request #313 from basho/bugfix/gh313-multiget-docs

multiget does not always return RiakObjects, as stated in documentation

Reviewed-by: javajolt
Remove stray print statement.
Merge pull request #355 from basho/bugfix/stray-print-statement

Remove stray print statement.

Reviewed-by: javajolt
Make PB the default protocol.
Fix other spots where 'http' was remaining.
Remove deprecated features.
Add properities to cache certificiates in `SecurityCreds`
Merge pull request #328 from basho/feature/gh328-remove-deprecated-features

Remove deprecated features

Reviewed-by: javajolt
Merge pull request #352 from basho/feature/bch/cache-certs

Cache Certificates in SecurityCreds

Reviewed-by: seancribbs
Merge pull request #341 from basho/feature/gh341-default-protocol

Default protocol is http

Reviewed-by: javajolt