Change a readme file

README.md

@@ -4,6 +4,28 @@
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 [![codecov.io](http://codecov.io/github/JuliaRecsys/DatasetsCF.jl/coverage.svg?branch=master)](http://codecov.io/github/JuliaRecsys/DatasetsCF.jl?branch=master)
 
-**Installation**: at the Julia REPL, `Pkg.clone("https://github.com/JuliaRecsys/DatasetsCF.jl.git")`
+**Installation**: at the Julia REPL, `Pkg.add("DatasetsCF")`
 
 **Reporting Issues and Contributing**: See [CONTRIBUTING.md](CONTRIBUTING.md)
+
+## Example
+
+```
+julia> using DatasetsCF
+
+julia> dataset = DatasetsCF.MovieLens();
+
+julia> using Persa
+
+julia> μ = Persa.mean(dataset)
+3.52986
+```
+
+## Datasets
+
+List of package datasets:
+
+Dataset      | Title
+-------------|------------------------------------------------------------------------
+MovieLens 100k  | This is a set of 100,000 ratings given by a set of users to a set of movies.
+MovieLens 1M    | This is a set of 10,000,000 ratings given by a set of users to a set of movies.