[ANN] ruby-oci8 2.1.2

Ruby-oci8 2.1.2 is released. This is the Oracle module using OCI8 API.

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

Specification changes

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- Statement caching in OCI is disabled by default.

This is workaround about a SIGSEGV issue.
See: [oracle enhanced issue
#162](https://github.com/rsim/oracle-enhanced/issues/162)

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

- delete code which overwrites signal handlers registered by ruby.
    See: [rubyforge thread
50690](http://rubyforge.org/forum/forum.php?thread_id=50690&forum_id=1078)

- fix internal heap error in OCI.
  See: [github issue #12](https://github.com/kubo/ruby-oci8/issues/12)
  (reported by Yasuo Honda)