Audit the codebase for spelling errors

[Exide]

There are a number of spelling errors throughout the code base that could be cleaned up. Two that come to mind immediately are:

src/main/java/com/flightstats/hub/webhook/Webhook.java:98
String channenUrl = RequestUtils.getHost(whp.getTagUrl()) + "/channel/" + channel.getName();

src/test/javascript/lib/utils.js:288
console.log("respinse " + body);

There are more out there.