MAINT: Move sample overview text to locale

The text has been moved to the american_gut.py locale file.
Merge pull request #79 from ElDeveloper/sample-overview

MAINT: Move sample overview text to locale
Merge branch 'master' of git://github.com/biocore/american-gut-web into new-participant

Conflicts:
	amgut/lib/locale_data/american_gut.py