slapos.core and zc.buildout version up

  Use slapos.core 1.2.2 with fixes for slapos node collector
  Use new zc.buildout with fixes on eggs filesystem permission
slaprunner: Don't compress for local transferences

Use compress for local transference is just slow.
version up: use newer zc.builout
slapos.core egg version up: use slapos.core 1.2.3.
no longer need to use custom eggs for permission issue.
version up eggs.
version up : curl 7.38.0.
version up : squid 3.4.7.
version up eggs.
version up : libffi 3.1.

also fix includedir and Libs in libffi.pc.
fixup! version up : libffi 3.1.