convert the text to lower case

[mengyingzhou]

hi, thank you for your awesome work.

this is not a bug, just a usage precautions. When you using this package, you need to convert the text to lower case by manual.

for example: the result of parse('Our') is blank, but parse('our') works.

thx Mengying

[chbrown]

Good point, thanks for the precaution! 😉

I wasn't doing that in my example 😞, much less indicating the importance of doing so.

Fixed in 60dbdc1 — improved documentation.