Support empty pages

Added

• Allow empty pages to be generated for a collection 3c94337

Fixed

• Encode pageContents into a buffer cbc6d6e

Allow `pageContents` by itself

Fixed

• Allow pageContents to be set on its own

Get Pages

Added

• Expose a getPages utility (from discussion here: #9 (comment)) which retrieves x number of pages centered

Index, First Page and Last Page References

Added

• pagination.index is a reference to the current page index (num - 1)
• pagination.first is a reference to the first page (pagination.pages[0])
• pagination.last is a reference to the last page (pagination.pages[pagination.pages.length - 1])

New Pagination Options

Changed

• Improve documentation on options

Added

• noPageOne Disable rendering page one when first is enabled
• pageContents Specify the contents inline for generated pages
• groupBy Provide a function or function string to group files into pages