Log Message:
Update ruby-moneta to 0.8.1.

0.8.1

* Adapters::TokyoTyrant - more consistent error handling
* Adapters::MongoMoped - support for moped gem v2.0
* Adapters::MongoOfficial - support for mongo gem versions 2-4
* Adapters::File - fix a bug in #load (#74)
* Adapters::LRUHash - allow to disable the limits by passing nil for max_size, \ 
max_count
* Transformer - don't use OpenSSL::Digest::Digest namespace
* Adapters::Sequel - fix issue with unknown "blob" type
* Rack::Cache - fix deprecated require paths
* Adapters::MemcachedNative - properly close connections
* Transformer - support bson gem versions 2-4
* Transformer - switch to rbzip2 gem for bzip2 support
* Adapters::MemcachedDalli - #create returns a boolean