[Gnash-dev] release_0_8_1 branch

[strk]

I tagged a release_0_8_1 branch since we're close to the release.
Feel free to dump all your hold-back code to head now :)

For the branch itself (which I invite core developers to take care
of till the release), we only want to fix the $pkglibdir thing,
any segfault that comes out in the last minute, any build error
and finally proceed with usual release procedure (dox & version updates).

The final release will be tagged with a 'release_0_8_1_final' name.

--strk;