remove util-env from news helper
sync with Context as of 2014-05-15
sync with Context as of 2014-05-31
sync with context as of 2014-07-05
sync with Context as of 2014-07-06
sync with Context as of 2014-07-09
sync with Context as of 2014-07-26
add “sign” target to makefile

We’ll be shipping GPG signatures along with releases from now on,
mirroring Luaotfload:

        https://github.com/lualatex/luaotfload/commit/2cd6d7aab3687bbfc43f1fc82da626b8c9395f27
Merge pull request #25 from phi-gamma/master

prepare release