hotfix for 3.2 not working because of xorg conf files splitting

none backend and --no-xorg, configdir, primusrun independence, fixes

primus support, bugfixes, compatibility fixes (v2)

Mostly fix for Bumblebee-Project#201

Bumblebee C implementation with improvements in Power Management

Merge pull request Bumblebee-Project#1 from Thulinma/master

Socket functions