MovieLens Datasets (#147)

* MovieLens 100k

* MovieLens 100k modular with test

* MovieLens 1m + doc_error_fix + indentation fix

* 20m+25m - tests - consistency

* tests and better metadata

* fix expected type

* ml-10m

* Docs

* Don't run ogbn-mag on Windows + remove comment

* Fix windows issue

* Update src/datasets/graphs/movielens.jl

* Update src/datasets/graphs/movielens.jl

* Update src/datasets/graphs/movielens.jl

* Update src/datasets/graphs/movielens.jl

* Update src/datasets/graphs/movielens.jl

* Update src/datasets/graphs/movielens.jl

Co-authored-by: Carlo Lucibello <[email protected]>

Author: Dsantra92

docs/src/datasets/graphs.md

@@ -28,4 +28,5 @@ PolBlogs
 PubMed
 Reddit
 TUDataset
+MovieLens
 ```

src/MLDatasets.jl

@@ -118,6 +118,8 @@ include("datasets/graphs/karateclub.jl")
 export KarateClub
 include("datasets/graphs/reddit.jl")
 export Reddit
+include("datasets/graphs/movielens.jl")
+export MovieLens
 
 function __init__()
     # TODO automatically find and execute __init__xxx functions
@@ -130,6 +132,7 @@ function __init__()
     __init__pubmed()
     __init__reddit()
     __init__tudataset()
+    __init__movielens()
 
     # misc
     __init__iris()