Forked Yampa-core with dep on vector-space
Replaced Forceable module by deepseq package
Cleaned up some modules.

MergeableRecord is gone. Miscellany is cleaned up.
Updated Cabal file version.
Cleaned up a lot of unused utilities.

This breaks compatibility with GHC pre-6.10, due to reliance on
the availability of Control.Category.
Changed type equality constraint to a FlexibleContext.
Pacifying hlint.
Turned tabs into eight spaces.
Split off semi-internal SignalFunction module.
Minor changes.
Bump version.
Merged changes by ony and rhymoid (from rhymoid's fork)