Start work on document builder.
Add multiple links.
Add curies with builder.
Optionally force-wrap links added with builder.
Embed documents with builder.
Test builder doc start with no embedded resources.
Link to documents and builders.
Reorder methods.
Chain builder operations.
Make draft 5 builder embed automatically link.
Let builder link to unicode href.
Add __init__'s keyword arguments to self link.
Link to builder from document.
Format source according to PEP 8.
Fix typo.
Make add_rel method look more private.
Add some docstrings to Builder.
Correct typo.
Update examples.
Remove obvious testing instructions and fix long line.