v0.17.0

• Fix string coercion for binary annotations in tracing
• Add Percent helper in config module
• Add local span support for tracing

v0.16.2

• Handle cassandra statements when setting statement span tag
• Add string_types to baseplate._compat

v0.16.1

• fix binary annotation passing in tracing rpc

v0.16.0

• add weighted lottery implementation
• add service discovery helpers
• add filename -> file config parser
• parameterize ThriftPool's transport factory
• add more configurables to Baseplate.configure_tracing
• fix client annotations in tracing
• add instrumentation for pymemcached

v0.15.0

• add zipkin-compatible request tracing to spans

v0.14.3

• fix issue where we were always setting 'trace' to True in the
  CassandraSessionAdapter

v0.14.2

• fix incorrect span.tag() calls that should be span.set_tag()

v0.14.1

• fix missed annotate->tag renames in cassandra integration

v0.14.0

• baseplate-script: respect logging configuration
• add support for headerless TBinaryProtocol clients
• capture full exc_info in span errors
• rename/refactor diagnostics APIs for OpenTracing aligment
• fix pyramid capture of exceptions in server spans
• add various standard OpenTracing tags to server spans

v0.13.0

• allow config.Optional options to have key missing from INI too
• make config.String and config.TupleOf enforce presence of values
• add helpers for loading Redis and Cassandra drivers from config
• make EventQueue a ContextFactory so it can go on the context object
• add baseplate-script for backend jobs