Add first tests

Change-Id: I7ef95cef912feb2b997e1c7da5eb5a369cbe56b1
diff --git a/tests/data/wpd19_10000.rocksdb.args b/tests/data/wpd19_10000.rocksdb.args
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+++ b/tests/data/wpd19_10000.rocksdb.args
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+-train models/wpd19_10000.w2vinput -save-vocab models/wpd19_10000.vocab -output models/wpd19_10000.rocksdb -type 5 -binary 1 -iter 1 -sample 0 -min-count 0