Purge CSD remnants.

This code is entirely tied to the (closed source) CSD stuff which is going
absolutely nowhere. Anything really useful here (the voicemail bits) will
presumably need full reimplementation, and the stuff here is useless for that.

Burn it.

Reviewed-by: John Brooks
[compilation] Fix compilation on glibc 2.19/gcc 4.8
Merge pull request #57 from faenil/nemomerge_fixes

[compilation] Fix compilation on glibc 2.19/gcc 4.8