gstreamer: update to 1.4.0, along with other bumps
webkitgtk: minor update
pythonPackages.httpbin: Add version 0.2.0
arcanist: 20140717 -> 20140812

Signed-off-by: Austin Seipp <aseipp@pobox.com>
Merge pull request #3557 from abhinav/master

pythonPackages.httpbin: Add version 0.2.0
tboot: restrict to one platform
mopdiy: Update from 0.19.0 to 0.19.3
mopdiy-moped: Update from 0.3.1 to 0.3.3
vimb: Update from 2.4 to 2.6
remarkjs: Update from 0.6.4 to 0.6.5
Security: Updated tboot to 1.8.2.

This includes a vulnerability fix for:
TBOOT Argument Measurement Vulnerability for GRUB2 + ELF Kernels