[ANN] ruby-oci8 2.1.5

Ruby-oci8 2.1.5 is released. This is the Oracle module using OCI8 API.

http://rubyforge.org/projects/ruby-oci8/

Windows x86 binary gem supports ruby 1.8, 1.9 and 2.0.0.
Windows x64 binary gem supports ruby 2.0.0.

New Features

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### 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
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- 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.