Remove Flying Sphinx.
Appraisals are now for v1/v2 (binary) and v3 (sphinxql).
Use https in Gemfile.
Cleaning up gemspec dependencies.

Getting a little opinionated here:

* dropping Cucumber for Combustion + acceptance specs.
* FakeFS and RSpec don't play nicely in 1.9.2, so that's gone as well.
* Minimum Resque version bumped up.
Acceptance specs and Combustion app setup files.
Simpler spec_helper, using Bundler.
Simpler Rakefile, dropping cucumber, using Bundler a bit more.
Removing version file. YAGNI.
Rails is already loaded if the Railtie is being required.
Reverting to simpler logic, at least for the moment.
Simple jobs using TS's built-in logic.
Dual-mode Deltas.
Removing Cucumber - RSpec acceptance tasks are simpler.
Removing specs for nonexistent files.
Unused methods (and specs).
Too hard to unit test different indexing logic at the moment.
Simplifying delta job spec.
Don't forget FlagAsDeletedJob in job types.
Fix constant references.
Updated Appraisal gemfiles.