Merge pull request #71 from dividedmind/support-no-database-yml

Use DATABASE_URL envar even if there's no config
Update History.md
Release version 0.9.5
Bump version for dev [skip ci]
Do not attempt to destroy not persisted session

Otherwise Sequel is raising error like this:

(Sequel::NoExistingObject) "Attempt to delete object did not result in a single row modification (Rows Deleted: 0, SQL: DELETE FROM \"sessions\" WHERE (\"id\" IS NULL))"
Merge pull request #72 from andreychernih/fix-new-session-deletion

Do not attempt to destroy not persisted session
Add Andrey Chernih (@andreychernih) to contributors
Upgrade RSpec to 3.1 and add Rails 4.2.0.rc1 to CI
Fix Ruby 2 hash usage in spec
Fix FakeFS to version 0.5.4
FakeFS 0.5.4 was not old enough to support ruby 1.8.x, set it to 0.5.3
This is getting absurd... set fakefs version in each ci Gemfiles
Release version 0.9.6
Let's try TravisCI bundler caching and new Docker based build
Don't run rubocop on cached bundler gems
Fix ActiveModel I18n integration

:i18n_scope is supposed to be a class method. Also, to humanize model names
:lookup_ancestors is required (provided by ActiveModel::Translation).
Merge pull request #77 from gix/fix/i18n

Fix ActiveModel I18n integration
Bump version to 0.9.7
Refactor database config normalization

Two minor changes to configuration_spec:
- replaced adapter_name with adaptername in dummy environments;
  underscore is not valid in URL schema
- URLencoded commas in search_path
Don't fail initialization if config/database.yml is missing