Update AlternativeTo.pm

Add alternativeto trigger to AlternativeTo spice. Fixes issue 183.
Merge pull request #394 from ZitZ/183

Update AlternativeTo.pm
Forecast: Accept "current temperature". Fixes #344.

The queries such as "current temperature" and "local temperature" can now be accepted as queries. Previously it would show the user the weather in Current, Bahamas--not what people usually search for.
Merge pull request #397 from duckduckgo/jag/fix/forecast-local

Forecast: Accept "current temperature". Fixes #344.
added "words related to" as a trigger