Refactor several APIs to improve stability

Allow Behat smoke test failures for now

Upstream is broken, and it's out of our control to fix
(Chrome bug) - see silverstripe/silverstripe-asset-admin#1163

ENHANCEMENT: Code gen stores entire config array

Context provider refactor

Refactor nested plugins as a service

Get rid of build state

Get builds working

Sorting and filtering working with new context providers

simplify dataobject resolve, get rid of default resolvers

Rebase, tests passing

New ResolverFailure, resolverComposition for better error handling

Fix schema context psr-4, queryhandlerinterface contract

Fix aliases in create/update, add massive integration test

Linting

Add test for aggregate function

.travis.yml

@@ -5,10 +5,10 @@ import:
 
 env:
   global:
-    - COMPOSER_ROOT_VERSION=4.x-dev
-    - SS_BASE_URL="http://localhost:8080/"
-    - SS_ENVIRONMENT_TYPE="dev"
-    - RECIPE_CMS_VERSION=4.x-dev
+    - COMPOSER_ROOT_VERSION="4.x-dev"
+    - REQUIRE_RECIPE="4.x-dev"
+    - REQUIRE_EXTRA="silverstripe/frameworktest:0.3.0"
+    - BEHAT_SUITE="asset-admin --config vendor/silverstripe/asset-admin/behat.yml"
 
 matrix:
   fast_finish: true