Hi! adding template for erlang eunit.

templates/erlang.eunit/%kata_file%.erl

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+-module(%kata_file%).
+-export([%kata_file%/0]).
+-include_lib("eunit/include/eunit.hrl").
+
+
+%kata_file%() ->
+  true.
+
+%kata_file%_test_() ->
+  { setup,
+   fun setup/0,
+   fun cleanup/1,[ 
+     ?_assert(%kata_file%())
+   ]}.
+
+setup() ->
+  ok.
+
+cleanup(_Pid) ->
+  ok.

templates/erlang.eunit/.meta

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+framework: erlang.eunit
+source_files: .*\.erl
+success_detection: "Test passed\.|All \d+ tests passed\."

templates/erlang.eunit/README

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+These files were created:
+  README is what you are currently reading
+  run-once.%sh% runs your tests once
+  run-endless.%sh% runs your tests endlessly via run-once.%sh%
+
+Run run-endless.%sh% and start your kata. (On Mac/Linux you have to call ./run-endless.%sh%.)
+
+The support for Erlang/EUnit was contributed by Jan-Felix Wittmann (Twitter: @leobm).

templates/erlang.eunit/run-endless.%sh%

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+codersdojo start ./run-once.%sh%

templates/erlang.eunit/run-once.%sh%

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+test -e ebin || mkdir ebin
+rm ebin/*
+erlc -o ebin/ %kata_file%.erl
+erl -noshell -pa ebin -s init stop -eval "eunit:test(%kata_file%, [verbose])"
+