Improvements for High Income Child Benefit Charge
Environment Agency fixes
More fixes for EA, UKVI, HMRC, etc
Abbreviations
Fix single quote
Merge pull request #210 from alphagov/synonyms-20140415

Synonym updates
Remove a double negative
Add a comment explaining used_params.

It's not very clear in the code that used_params is populated as a side
effect of access to the parameters.  I can't think of a way to structure
the code to make this clearer (at least, not without making the code
much more complex).
Remove duplicate copy of a test
Merge pull request #209 from alphagov/parameter_validation

Validate unified_search parameters
Remove excess parentheses
Use %Q{} for strings containing quotes
Correct variable name in comment
Use .find when converting index name to short form

This is a bit clearer to read.
Use {} for chained block, as per styleguide
Assert that stubbed method was used directly

Instead of copying the expected url and asserting that that was called.
Move more presentation into UnifiedSearchPresenter

Move all the interpretation of the response from elasticsearch into the
UnifiedSearchPresenter, which seems a better place for presentation
logic, and this makes the code clearer.