Add comments for Document
Expose collections as site.<collection_name> in Liquid as array of docs.
EntryFilter#special? should also check the base name of the entry
Filter entries in the collection per EntryFilter#filter
Include data in the array of collections
Fix test for non-collectionized sites still containing data coll
Use #error instead of #warn when telling the user not to use a custom data source
Code/docs cleanup, props @baweaver
Clean up some code per @baweaver's suggestions.
Update docs around collections.
Don't gather any entries if the collection directory doesn't exist
Fix #filtered_entries so it returns a new Array if the directory doesn't exist
Merge pull request #2199 from jekyll/collection-plate
Update history to reflect merge of #2199 [ci skip]
Release 2.0.0.alpha.3
Remove stray sentence from Collections doc page.
Use +rb switches when reading in file for checking existence of YAML header.

Fixes #2228.
Only read in 5 bytes when checking for YAML header.

#2211 #2210
Change the feature to not use `page.name`

Use `page.description` in the cucumber feature instead. `page.name`
isn't overridable anymore.
Add a to cross-reference about post_url

I had a really hard time finding this information on the Jekyll site,
and this seemed like a reasonable place to put a pointer to the
information.