emacs: check if set-temporary-overlay-map is supported
emacs: fix latency on win32
Import original source from OCaml 4.02
Update lexer to match OCaml 4.02
Update parser to match OCaml 4.02
Sync Merlin typer to OCaml 4.02
Fix build for 4.01
OCaml 4.02: import Consistbl fix
Disable warnings by default

Warnings are now only explicitly caught when typing functions.
Syntax error explanation: close over nullable symbols
Remove symbol class names from error messages
Error_report: reuse "Location" error infrastructure
Add src/ocaml to .gitignore
Always add global modules
Env: add stub for plugging external module finder
Add mechanism for auto loading unknown units from package paths