update js_of_ocaml to 2.5
update tyxml to version 3.3.0
add version number to the name of the js_of_ocaml package
Updgrade ocsigen-server to 2.5
Update eliom to 4.1.0
Make uutf a *propagated*BuildInput of ocamlPackages.tyxml
Build js_of_ocaml with tyxml support
Adapt the derivation for the update of eliom to 4.1
Use opam to actually install eliom
Use propagatedBuildInputs in eliom
KDevelop: Add some propagatedUserEnvPkgs dependencies.
Now KDevelop should start in a functional form without having to
manually install those.
Make boost 156 the default
boost: Change header output name
boost: Fix library dependencies
Revert "boost: Quick eval fix"

This reverts commit eb3794186c7357c9cf1abc5d9162d16f29526996.
boost: Remove boost.lib
boost: Remove legacy users
jfsrec: Remove derivation
boost: Remove old boost
boost: Refactor into generic.nix