Updated apiv2 todo
#598 updating apiv2 overview page and correcting other small things
#598 more updates on apiv2 overview page
#598 more updates on apiv2 overview page
#598 Updated sound search resource docummentation
#598 Updated sound instance resource docummentation
#598 Updated sound advanced search docs
Updated requirements.txt with production BeautifulSoup and PyYAML versions
Changed BeautifulSoup version in requirements.txt to 3.2.0
#598 Updated api docs for Advanced Search resource
#598 More updates on api docs for Advanced Search resource
Merge branch 'master' into apiv2