Add ppx_monad.0.0.1
atdgen 1.5.0
Changed maintainer email address to martin@mjambon.com
ppx_tools: fix opam 1.1 syntax.
Merge pull request #3164 from m2ym/ppx_monad.0.0.1

[Request] ppx_monad.0.0.1
Merge pull request #3166 from mjambon/master

atdgen 1.5.0
Merge pull request #3167 from whitequark/fix-ppx_tools

ppx_tools: fix opam 1.1 syntax