More tests, filtering iterator, cleanup

README.md

@@ -45,3 +45,39 @@ foreach ($reader as $row) {
     // row is an array
 }
 ```
+
+# Documentation
+
+## DatasetManager
+
+The `DatasetManager` will automatically locate and load datasets on startup.
+
+```
+getDataset(string $identifier): Dataset
+    Return a Dataset object, or throw exception on error
+openDataset(string $identifer): Iterator
+    Return a reader for a Dataset, same as getDataset()->open()
+getAvailableDatasets(): array
+    Returns the Dataset objects for all datasets found
+```
+
+## Dataset
+
+```
+open(): Iterator
+    Return an iterator to iterate over the data
+filter(array|callable $condition): Iterator
+    Return an iterator that only returns rows matching filter
+getIdentifier(): string
+    Return the dataset identifier (vendor/package#dataset)
+getVersion(): string
+    Return the package version of the dataset
+getPackageName(): string
+    Return the package name (vendor/package)
+getDatasetName(): string
+    Return the dataset name (dataset)
+getLicense(): ?string
+    Return the license for the dataset
+getComment(): ?string
+    Return the dataset comment
+```