Define MaidsafeGeneratedSourcesDir and install headers from it.
Merge pull request #147 from smspillaz/maidsafe/next/nfs/4

Define MaidsafeGeneratedSourcesDir and install headers from it.
Merge branch 'next' of https://github.com/maidsafe/MaidSafe into next
SHA stamp by Jenkins as building correctly
Merge remote-tracking branch 'origin/next' into next_ned14