Fix typo on crypto declaration

Hey,

I recently started to play with existing RTM software and found also your's rtm-js too.
Just noticed a small typo on crypto declaration and thought to make pull request (my first try).

Github shows also changes for one name (containing UTF-8 special character) and for new line at end of the file.
I did not do there changes. I just edited the crypto part on github web editor.

BR
Ilari