HelpLine: Add the sources of the suicide numbers.

I also limited the triggering to exact matches because it's really hard to distinguish between non-suicide queries ('suicide girls', 'suicide silence', 'suicide is painless', etc.) and suicide queries. The plan is to just build on the list of suicide-y queries as we go along.
Helpline: Fix tests.
Helpline: Remove Canada from the tests.
HelpLine: Added more triggers.

Thanks to @zekiel and @moollaza.
HelpLine: Have similar number formatting for both kids and regular.
HelpLine: Add "suicide help";
HelpLine: Add "suicide intervention".
HelpLine: Added more suicidey triggers.
HelpLine: Add "ways to kill myself".
HelpLine: Add the country in the output.
HelpLine: Renamed "US" to "U.S."
HelpLine: Update tests.
Merge pull request #305 from duckduckgo/jag/release/suicide

HelpLine Release