Fix deprecation warnings in action pack render tests

Responders now return 204 No Content for API requests without a response body (as in the new scaffold)

Scaffold returns 204 No Content for API requests without content. This makes scaffold work with jQuery out of the box.

Added test case for postgresql database

This should go in your ~/.gitignore.

This reverts commit e75c18bf.

Tests were failing on Travis-CI.

This reverts commit 79d01a8f, reversing
changes made to b838570b.

Unused variable removed

Fix deprecation warnings in action pack test suite due to passing template formats in the template name.

Remove needless to_param in scaffold functional test

Merge pull request #2419 from dmitriy-kiriyenko/drop_test_database_in_development_when_running_rake_db_drop

When running "rake db:drop" also drop test database in development environment

ActionPack test fix for RBX

Bump sprockets

Remove Turn from default Gemfile.

We still looking for a best presentation for tests output.

This reverts commit c3309052, reversing
changes made to 1c1c3fc2.

Using middleware name to show proper name in the info

No need to check ruby version here as rake 9.2.2 is out with the same fix

As rake 0.9.2.2 is out with the same 
fix as 0.9.3.beta having

Warnings removed from RequestIdTest