Latex: Remove redundant trigger word.

It's redundant because the trigger words are not case-sensitive. So "latex" would also trigger on the query "LATEX".
Merge pull request #266 from duckduckgo/jag/improvement/latex

Latex: Remove redundant trigger word.
Fix an XSS bug in chess960. Also took some time to cleanup.

--Moved data array outside of handle function.
--Changed header to position number.
--Changed link text to More at Wikipedia.
--Moved Wikipedia link underneath the image.
Update chess960 test
Fix(tm) some currency symbol issues in Loan
Latex: Wraped code in <pre> tags.
Latex: Fix tests.
Merge pull request #267 from duckduckgo/jag/improvement/latex-style

Added <pre> tags around the code.
BashPrimaryExpressions.pm: New Goodie for help with bash primary expressions ([ -a hello ])
BashPrimaryExpressions: Adding support for comparison operators, (<> -lt etc) and not
BashPrimaryExpressions.pm: Adding support for -nt, -ot, -ef
BashPrimaryExpressions: Fixing Category and example queries
BashPrimaryExpressions: fixing typo in primary query
Latex: Add a "More at ..." link at the bottom.
Merge pull request #269 from duckduckgo/jag/latex/more-at

Latex: Add a "More at ..." link at the bottom.
Latex: Link to different sections of Wikibooks instead.
Latex: Do not camelcase Wikibooks.
Latex: Change the header.
Latex: Fix tests.
Latex: Capitalize the title.