Added a link to grape-active_model_serializers.
Add missing quote in documentation
Merge pull request #432 from rymai/patch-1

Add missing quote in documentation
Stop testing Grape against unsupported Ruby 1.8.7 variants.
Merge branch 'master' of github.com:intridea/grape
Refactored a few API accessors.
Merge pull request #435 from namusyaka/refactor-some-codes

Refactored a few API accessors.
fixed curl calls to set the accept headers properly
Merge pull request #441 from CansaSCitySchuffle/fix-version-example

fixed curl calls to set the accept headers properly
API version can now take an array of versions.
specs for issue #319 (optional groups)
possible implementation for #319

Might be better to go with `optional_group(element)` than `group(element, required: false)`?
refactor
use optional_group(e) rather than group(e, optional: true)

feels a little clearer.
Set :en as fallback locale for grape errors when translations are missing for the default locale
update readme and changelog
Merge pull request #444 from aew/master

Set :en as fallback locale for grape errors when translations are missin...
update CHANGELOG and README
initialize ParamsScope with a hash of options
remove ParamsScope#optional_group, and instead allow #requires and #optional to take blocks