Fix home highlights feed code
Merge pull request #87 from DaMouse404/fix-feeds

Fix home highlights feed code
Move response grouping logic into Programmes feed only as it's not relevant for most other feeds
Fix misleading errors in test cases. When there was a fixturing problem, the error reporting would fail, causing a new and misleading error, adding the counter name onto the fake class fixes this so you get real errors through
Add parallel request functionality onto the broadcasts feed