Character Counter (Chars.pm) - More triggers, quoted strings and better tests

Trying to get the DuckDuckHack experience first hand! I see that some of the docs are based on this instant answer, so no worries if you would prefer to leave the IA as it is.

Includes a bunch of tests for the triggers and the different expected behaviors. All currently passing.
Works perfectly! Would like to add "number of characters" and "number of chars"  and "count characters" (I typed in "number of characters in mississippi"--although this could be interpreted as the number of actors in a movie)