Switch travis to ruby 2.1, next try
Merge pull request #894 from opf/feature/travis_ruby_21

Switch travis to ruby 2.1, next try
Configuration: Fix setting rails_cache_store via environment variable

Environment variables can't have Symbol values.
Merge pull request #901 from opf/fix/cache_config_via_env_var

Configuration: Fix setting rails_cache_store via environment variable
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make tests timezone independant.
Changelog.
Merge pull request #902 from opf/fix/grunt_xunit

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