Move versioned releases into package subdirectory

This was an error introduced in #1797
Update deps and version constraints for packet and openflow
Add frenetic.2.0.0 release
Update maintainer email address
frenetic: add ocaml version constraint
Added websocket 0.8.1
Merge pull request #1838 from vbmithr/master

Added websocket 0.8.1
Sync latest compiler pull requests
Merge pull request #1839 from bactrian/sync-prs-1395918800

Sync OCaml compiler PRs
fix some react dependencies
ott: rename ott.distro-0.21.2 to ott.0.21.2. Fixes #1841.
+ott.0.24
Merge pull request #1842 from dsheets/master

Fix ott version order, publish ott 0.24
Merge pull request #1840 from diml/master

fix some react dependencies
Sync latest compiler pull requests
Merge pull request #1843 from bactrian/sync-prs-1396051201

Sync OCaml compiler PRs
bson 0.89.3 & mongo 0.67.2
Merge pull request #1844 from msimon/master

bson 0.89.3 & mongo 0.67.2
Added compiler switch for constructors with records
Add pci-db (0.3.0) to OPAM repo