Conversions: update to 0.026.

Corrects the conversion factor for square kilometers, fixing #733 in the
process.

Also, adding a couple more regression area tests, with answers confirmed
via alternative sources.
Merge pull request #735 from mwmiller/conversions_update

Conversions: update to 0.026.
Conversions: Adding failing test for not triggering on just unit names
Conversions: Enforcing whitespace after the left_unit to fix triggering on "seconds"
Conversions: Adding more tests around units
Merge pull request #738 from duckduckgo/mintsoft/conversions_fixes_yet_again

Mintsoft/conversions fixes yet again
Explain how tests should be updated

Add new tests for updated triggers, modify existing test for modified results
Merge pull request #741 from duckduckgo/zaahir/update-contributing

Explain how tests should be updated
Created my first Goodie
update Goodie template, currently adding extra depth to code_url link
Merge pull request #750 from duckduckgo/zaahir/template-fix

update Goodie template, currently adding extra depth to code_url link
Small cleanup of IsAwesome Goodies
- Removed unneeded comments
- Added ABSTRACT where missing
- Filled in Metadata where missing
Merge pull request #751 from duckduckgo/zaahir/isawesome-updates

Small cleanup of IsAwesome Goodies
DuckDuckGo: Metadata does not actually work.
Reverse: Update metadata
DuckDuckGo.t: test example queries.

Also, add some commetns to give the file a bit of structure.
Reverse.t: delineate example query.
Merge pull request #753 from duckduckgo/jag/duckduckgo-meta

DuckDuckGo: Example query does not actually trigger the IA.
Merge pull request #754 from duckduckgo/jag/reverse-meta

Reverse: Update metadata
NumberStyler: allow for space and underscore separation.

This allows people to enter numbers in a more visually kind way,
without breaking the general paradigm.