Add erlang R16B1

Signed-off-by: Moritz Ulrich <moritz@tarn-vedra.de>
Package elixir and rebar.

Signed-off-by: Moritz Ulrich <moritz@tarn-vedra.de>
Add meta for elixir & rebar.

Signed-off-by: Moritz Ulrich <moritz@tarn-vedra.de>
Add myself as a maintainer to erlang R16B1 and elixir.

Signed-off-by: Moritz Ulrich <moritz@tarn-vedra.de>
Merge pull request #811 from the-kenny/erlang-elixir

Update erlang to R16B1, add elixir and rebar