Fixes #42, apostrophes in SSIDs cause scan to exit with an exception

[mcdonc]

• Description of what the PR does, such as fixes # {issue number}

Fixes #42 (scan exits with an exception if there is an apostrophe in the ssid)

• Description of how to validate or test this PR

Work through mycroft-wifi-setup in the presence of a Wifi network with an SSID that includes an apostrophe in its name.

[krisgesling]

Thanks Chris - this looks pretty straight forward. I'll try find some time to do a quick verification on a Mark 1.