Added a configurable option for pjax

Some actions, like logging in as another user, should be rendered
in the app, not via pjax.  This change allows an action to indicate
how it should be rendered.
Bump version to 0.4.3
Merge pull request #1295 from stympy/master

Added pjax? option to Actions::Base
Remove history section [ci skip]
Rename public certificate
Add official support for Ruby 2.0.0
Reduce the number of Travis builds
Update Code Climate badge [ci skip]
Delete custom build script
Make gem dependencies more consistent
Model plural label fix

Count must be 'other' to apply :other key with every locale. 
fix for ckeditor
Update haml dependency to version ~> 4.0
The source :rubygems is deprecated because HTTP requests are insecure.
Bump version to 0.4.5
cd back to the project root before running specs
Fix safe_yaml depercation message

There is a depercation message "The method 'YAML.enable_arbitrary_object_deserialization!'
is deprecated and will be removed in the next release of SafeYAML -- set
the SafeYAML::OPTIONS[:default_mode] to either :safe or :unsafe.", this
commit fixes it.
add decimal and float range query

extending @akm integer range query code to float 
and decimal fields
Merge branch 'decimal_and_float_comparison' of github.com:thiagobrandam/rails_admin into decimal_and_float_comparison