vala: update to 0.23.1, remove old versions

set license to lgpl2Plus
add myself to maintainers
and some cleanup
vala: fix typo in license
haskell-poppler package is added.
haskell-poppler: re-generate expression with cabal2nix
nodejs: update from 0.10.22 to 0.10.24
cryptsetup: update from 1.6.2 to 1.6.3
Merge pull request #1470 from iyzsong/vala

vala: update and cleanup
New expressions: yi, yi contrib and dependencies
Merge pull request #1474 from bennofs/editor-yi

New expressions: yi, yi contrib and dependencies
haskell-pretty-show: update to version 1.6.5
haskell-git-annex: update to version 5.20140107
haskell-cipher-aes128: update to version 0.6.1
haskell-fast-logger: update to version 2.1.1
haskell-highlighting-kate: update to version 0.5.6
haskell-hxt: update to version 9.3.1.3
haskell-idna: update to version 0.3.0
haskell-stringprep: update to version 1.0.0
haskell-system-fileio: update to version 0.3.12
haskell-system-filepath: update to version 0.4.9
haskell-texmath: update to version 0.6.6