Added Ruby-2.0.0-rc2 headers

Signed-off-by: Mikhail S. Pobolovets <styx.mp@gmail.com>
Version bump 1.1.8.1 (for dev purposes)

Signed-off-by: Mikhail S. Pobolovets <styx.mp@gmail.com>
Ignore pkg directory by git.

Signed-off-by: Mikhail S. Pobolovets <styx.mp@gmail.com>