Fix NPE when new updated_at column was added to existing model and it contains null values
Merge remote branch 'kir/master'
Spec fixes and credit for previous commit.
Remove gemcutter references, add Gemfile instructions.
1.0.3
Fix url in ts-datetime-delta.gemspec
Merge pull request #7 from biow0lf/patch-1

Fix url in ts-datetime-delta.gemspec
Merge remote-tracking branch 'upstream/master'

Conflicts:
	lib/thinking_sphinx/deltas/datetime_delta.rb