specify api_version in the calls
ignore swp files
use json instead
move api calls into a function
read api key from stdin
send those error messages to stderr
add a newline for pretties
reorder the input checks
support multiple mixes
update usage comment
use -p on mkdir so directories get made as needed and avoid that silly crash
Merge pull request #1 from omsmith/master

Multiple Mixes. JSON. Housecleaning