Release Name: 2.1.5

Notes:
New Features
------------

### V$SESSION_CONNECT_INFO.CLIENT_DRIVER.

'rubyoci8' is set as the driver name, which is displayed in
V$SESSION_CONNECT_INFO.CLIENT_DRIVER when both the client and
the server are Oracle 11g or upper.

Fixed Issues
------------

-   fix segmentation fault when the process exits on rubinius.

-   fix "OCI Library Initialization Error" only when the Oracle
    instant client is 11.2.0.3 for Solaris x86 32-bit, the ruby
    version is 1.9.3 or upper and the ruby is compiled by gcc.



Changes: