Wolfram improvements and hardware test

With this new release, the Wolfram Alpha Skill now gives much more concise responses. Rather than reading all 10 definitions, Mycroft will only read the first. Along with that, when Wolfram cannot find anything for a particular query, rather than speaking the result from the Did you mean? query, he simply mentions he could not find any results but did find something for an alternative query.

This release also brings in a basic hardware test. When activated by holding the button for 5 seconds, Mycroft will now run through tests to verify that the display, knob, microphone, and speaker are all working properly.