Create follow up issues from first release

[gr2m]

These are follow ups to #1

• Paginate project.items.list(), support loading all items beyond the current limit of 100 #3
• Add issue to track lack of API for adding draft items project.items.addDraft(fields) #4
• Support projects on a personal account #5
• project.items.update() that sets { title } but is not a draft should throw a helpful error. title is only editable while item is a draft #6
• add *ByRepositoryAndNumber() methods #7
• make fields accept options such as name, type, and options #8