Merge pull request #352 from jane-street/master

Change the maintainer of all core packages
type_conv.109.07.00 is for >= 4.00.0 only
closes #354
small fix, no version update
[Alt-ergo] 0.94 -> 0.95 url and md5sum
[Alt-ergo] 0.95 add altgr-ergo and API
Merge pull request #355 from camlspotter/pr

small fix, no version update
Merge pull request #356 from bobot/master

Alt-Ergo 0.95
add a temporary restriction on the latest Core to only build on Linux until the next point releases fixes the issue.

While we could add a more relaxed constraint on just Core and not the sub-packages, there are a few issues in the solver heuristics that prevent this from currently working (@samoht is looking into it)
fix the checksum in latest typerex
Add oasis dependency to utop 1.3
disable -warn-error for all Core's 109.07.00 packages