Release Name: 0.0.5

Notes:
Ruby/groonga is a extension library to use groonga's DB-API
layer. Ruby/groonga provides Rubyish readable and writable
API. You can use groonga's first and highly functional
features from Ruby.


Changes:
* [#26145] Added Groonga::TableKeySupport#has_key? [Tasuku SUENAGA]
* [#26146] Groonga::Record#[] raises an exception for nonexistent
  column name. [Tasuku SUENAGA]
* Supported 32bit environment [niku]
* Added a test for N-gram index search [dara]
* Added APIs
  * Groonga::Record#incemrent!
  * Groonga::Record#decemrent!
  * Groonga::Record#lock
  * Groonga::Table#lock
  * Groonga::Schema: A DSL for schema definition
  * Groonga::Expression