pat/ts-datetime-delta — pull request #16 by deees (2014-12-10 10:26:47+00:00)
Title: Do not check context to determine thinking sphinx version

It clashes with rspec 3.x `context` method, so instead let's use `ThinkingSphinx.sphinx_pid`

With thinking-sphinx v3:
```
[1] pry(main)> ThinkingSphinx.context
=> RSpec::ExampleGroups::Anonymous
[2] pry(main)> ThinkingSphinx.sphinx_pid
NoMethodError: undefined method `sphinx_pid' for ThinkingSphinx:Module
from (pry):2:in `

'
[3] pry(main)>
```

@pat