[SPARK-1874][MLLIB] Clean up MLlib sample data

1. Added synthetic datasets for `MovieLensALS`, `LinearRegression`, `BinaryClassification`. 2. Embedded instructions in the help message of those example apps. Per discussion with Matei on the JIRA page, new example data is under `data/mllib`. Author: Xiangrui Meng <[email protected]> Closes apache#833 from mengxr/mllib-sample-data and squashes the following commits: 59f0a18 [Xiangrui Meng] add sample binary classification data 3c2f92f [Xiangrui Meng] add linear regression data 050f1ca [Xiangrui Meng] add a sample dataset for MovieLensALS example
figo · May 20, 2014 · bcb9dce · bcb9dce
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diff --git a/data/mllib/sample_binary_classification_data.txt b/data/mllib/sample_binary_classification_data.txt
diff --git a/data/mllib/sample_linear_regression_data.txt b/data/mllib/sample_linear_regression_data.txt