Remove logging value, improve nested loading performance.
Merge pull request #831 from dblock/remove-logging-value

Remove logging value, improve nested loading performance.
Removed leftover pp.
Merge pull request #837 from dblock/remove-pp

Removed leftover pp.
Next version will be 0.10.0, documented a couple of UPGRADING gotchas.
Remove rails Gemfile lock files.
Fix spec with a newer Grape-entity version.
Adding note about changes to custom validators.
Merge pull request #838 from ppadron/patch-2

Adding note about changes to custom validators.
Find coerce_type for Array when not specified
Merge pull request #826 from manovotn/array_without_coerce_type

Find coerce_type for Array when not specified