Added Minetest-0.4.4.
gcc46_multi: Don't try to build on non-64-bit-linux
tex4ht: texLiveAggregationFun expects the texmf directory in $out, not $out/share

I also made some cosmetic changes to the expression.
texLiveFull: add tex4ht
haskell-Agda: jailbreak to support the latest version of 'hashtables'
haskell-darcs: update to version 2.8.4
haskell-HSH: update to version 2.1.0
haskell-SDL-ttf: update to version 0.6.2
haskell-base64-bytestring: update to version 1.0.0.1
haskell-classy-prelude-conduit: update to version 0.5.0
haskell-classy-prelude: update to version 0.5.0
haskell-hashtables: update to version 1.1.0.2
haskell-project-template: update to version 0.1.2
haskell-reflection: update to version 1.1.7
haskell-snap-core: update to version 0.9.3.1
haskell-snap-server: update to version 0.9.3.1
haskell-stylish-haskell: update to version 0.5.6.0
petidomo: add version 4.2
boost: remove obsolete version 1.46.0
boost: remove obsolete version 1.51.0