SHOW_BLOCKS PAGINATION:

- Get total count of blocks in a BlockBatch within showBlocks()
- Fetch perPage (500) blocks at a time
- Offset blocks fetch based on "?page=" querystring
- Pass currentPage and pages[] to templates/show_blocks
SHOW_BLOCKS PAGINATION:

pagination.mustache made for inclusion in show-blocks
CSS counters added to style.css for numbering pagination links
pagination.js handles detecting current page and navigating to others
Remove 'theres_more' flag