add bittorrent sync
sqlite: downgrade from version 3.7.16.1 to 3.7.14.1

The recent sqlite update broke -- among other things -- the Hydra regression
test suite. Until these issues have been resolved, we stick to the older
reliable version.
haskell-MonadRandom: update to version 0.1.9
haskell-skein: update to version 1.0.2
Fix incorrect attribute name
Revert "Fix incorrect attribute name"

This reverts commit 699d6a0bdee7a1bc698d834fe853f6133c118cc6.