stop displaying field name in inline error, sum up all errors, not only base ones in flash message. This fixes no errors being displayed with nested forms or when the field with the error is not present in the form.
Refactor to fix Rubocop offenses
Merge pull request #2069 from orendon/fix-rubocop-offenses

Refactor to fix Rubocop offenses
Lower coverage threshold to 91.65 percent for mongoid
Optimize images

[ci skip]
Merge pull request #2072 from sferik/squish

Optimize images
Column#primary was removed at Rails4.2
Merge pull request #2073 from tsukasaoishi/for_rails42

Column#primary was removed at Rails4.2
Support Rails 4.2
Remove mongoid-grid_fs version lock
Use String#encode instead of Iconv

Modify to use String#encode instead of Iconv when ASCII Encodings.
There are two reasons:

1. @iconv was defined only encoding_to is NON_ASCII_ENCODINGS
2. Iconv is replaced from ruby-2.0

But when NON_ASCII_ENCODINGS, String#encoding cannot convert then
use Iconv as in the past.
updated routes to rm deprecation warning
Merge pull request #2077 from afxjzs/master

updated routes to rm deprecation warning when running rake test
Support Japanese encodings.
Merge pull request #2078 from mtfuji/master

Support Japanese encodings.
Friendlier error if filter is not found

If user sets, e.g., `filters [:name, :manager]`,
and manager is not set to `filterable true`,
RailsAdmin currently raises a NoMethodError
when trying to call `.type` on nil.

This change raises a more descriptive error
to help the user find the problem
Merge pull request #2079 from nathanl/friendlier_filter_error

Friendlier error if filter is not found
Move navigation out into partial so it can be easily overridden
Merge pull request #2081 from thefrontiergroup/feature/easily_replace_header

Move navigation out into partial so it can be easily overridden
Bump version to 0.6.4