Bump version number to 0.6.0-dev
(erlang) Add example of piqi-any (untyped JSON and XML)
(doc) Formatting in encodings.md
(doc) Workaround a pandoc bug (incrorrect handling of ` `)
Update INSTALL.ocaml

Stable Piqi versions can now be installed using OPAM (package manager for
OCaml).
(piqi) Fix a bug in "piqi compile"

Unknown fields from included modules were discarded instead of being included in
the top-level module.
(piqi) Fix a bug in "piqi compile"

assertion failure when processing protobuf-packed repeated fields and lists
piqi-0.6.1 release
Merge branch 'dev'