Waffle for large data

[langtonhugh]

For data containing > 5,000 abstracts (roughly), the waffle output is rendered rather useless. Could be fixed with ifelse statements, plotting differently for different sample sizes. For example:

• less than 5000 abstracts, 1 square = 1 paper
• more than 5000 abstracts, 1 square = 10 papers
• etc.