Sync latest compiler pull requests
Merge pull request #1877 from rgrinberg/master

opium 0.6.4
camltc.0.9.1
Added ocaml-text 0.7
Add mesh 0.8.4
Merge pull request #1878 from Incubaid/camltc.0.9.1

camltc.0.9.1
Merge pull request #1879 from vbmithr/master

Added ocaml-text 0.7
Merge pull request #1880 from Chris00/master

Add mesh 0.8.4
Merge pull request #1876 from bactrian/sync-prs-1396998001

Sync OCaml compiler PRs
mustache 0.0.2

thanks @mk270