Initial commit of libspectre 0.2.6

Needed by upcoming Evas for the Enlightenment project.
The libraries are currently shipped with evince from JDS.

I keep the pull request open and modify it, it should be taken into consideration after the following steps are in order:
<pyhalov>
1) rollback libspectre to 0.2.6 
2) add poppler to be compiled with g++ and delivered to /usr/g++
3) bring evince to oi-userland, make it use new poppler version
4) bring desktop tracker and gimp to oi-userland.
</pyhalov>