pythonPackages.cvxopt: added package
python: make 2.6 and 2.7 expr similar, introduce includeModules

When includeModules is true, python is built with all optional modules
as part of derivation.
pythonFull -> python with all modules, pythonFullWithPkgs -> buildEnv
haskell-DAV: update to version 1.0.3
haskell-HSH: update to version 2.1.1
haskell-HaTeX: update to version 3.14.0.0
haskell-boomerang: update to version 1.4.5
haskell-derive: update to version 2.5.18
haskell-happstack-lite: update to version 7.3.5
haskell-happstack-server: update to version 7.3.9
haskell-haskintex: update to version 0.5.0.2
haskell-leveldb-haskell: update to version 0.6
haskell-pdf-toolbox-content: update to version 0.0.3.1
haskell-pdf-toolbox-core: update to version 0.0.3.0
haskell-pdf-toolbox-document: update to version 0.0.4.0
haskell-thyme: update to version 0.3.5.3
haskell-web-routes-boomerang: update to version 0.28.3
haskell-web-routes: update to version 0.27.7
haskell-hlint: update to version 1.9.9
haskell-jwt: update to version 0.4.2