Update readme.txt

Add FAQ about Disqus.
log proper var
accomidate new search api response
update aggregate_by_url

  - Do encoding once in request call
  - provide different message for empty repsonse (vs error)
allow sopresto proxy to urlencode GET requests (specifically for search)
no need to check for url existance
check for response, before checking response->statuses is set
replicate "result" structure from aggregate_by_api method (which works
as expected)
proper var names
Fix broadcast warning with no _accounts meta
Merge branch 'feature/empty-broadcast-account-warnings' into develop
Merge branch 'feature/search-api-change' into develop
bump version numbers and add to changelog for 2.8
change mentions endpoint to conform with v1.1 of the Twitter API
add 1.1 version to twitter endpoints
update button styles
whitespace and add button styles to changelog for 2.8
Merge branch 'release/2.8'