darcsver: Upgrade from 1.7.2 -> 1.7.4
pycryptopp: Upgrade from 0.5.29 ->
0.6.0.1206569328141510525648634803928199668821045408958
twisted: Upgrade from 10.2.0 -> 13.2.0
zfec: Upgrade from 1.4.7 -> 1.4.24
nix-prefetch-git: Convert relative submodule URLS to absolute URLS

nix-prefetch-git does not convert relative submodule urls into absolute
urls based on the parent's origin. This patch adds support for
repositories which are using the relative url syntax.
pysqlite: Upgrade from 2.5.5 -> 2.6.3
tahoe-lafs: Upgrade from 1.9.2 -> 1.10.0

Remove patches which do not apply to the newer version.
haskell-git-annex: update to version 5.20140108
haskell-cipher-aes128: update to version 0.6.2
haskell-hledger-lib: update to version 0.22.1
haskell-hledger-web: update to version 0.22.1
haskell-hledger: update to version 0.22.1
haskell-cabal2nix: update to version 1.58
haskell-fast-logger: update to version 2.1.2
haskell-text: update to 1.1.0.0
haskell-packages.nix: strip trailing whitespace
happy-1.19.2: remove import of "Data.Monoid (<>)" from Setup.lhs to fix build with GHC 7.2.2

This patch works around <https://github.com/simonmar/happy/issues/16>.
parsec-3.1.4: jailbreak to fix build with recent versions of 'text'
yi: re-generate expression with cabal2nix
Merge pull request #1492 from wkennington/master.tahoe

Upgrade tahoe-lafs