Small edits

[wibeasley]

This sounds like cool package. Thanks for experimenting with it. Hope it goes where you want it. I had fun reading this document.

• The "Manual Loading" wasn't being recognized as an H3 because it needed a blank line above it.
• I thought "Direct Loading" might be more clear the "Manual Loading"?
• emphasize the distinction where the processes are loaded
• some word was missing after "relatively"
• fewer/less (so my partner won't slap my hand with a ruler)
• hyperlink to nycflights and party_df.

[hadley]

Thanks!