Add example data and tests

Change-Id: Ife7b03d33607ec6c27da39b783e66e28f6496bbc
diff --git a/example-models/wpd19_10000/wpd19_10000.rocksdb.args b/example-models/wpd19_10000/wpd19_10000.rocksdb.args
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index 0000000..df4fe18
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+++ b/example-models/wpd19_10000/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