Removing cucumber scenarios, plugin files.
Updating for edge Thinking Sphinx.
Updating docs and Travis to match edge expectations.
Update FlagAsDeletedJob to use ts connection

Update FlagAsDeletedJob to use ts connection
Merge pull request #30 from iHiD/edge

Fixes "NoMethodError: undefined method `connection' for #<ThinkingSphinx::Configuration:0x007fdb75d89c78>"
Use connection pool for document deletion.
Updated development dependencies.
No need for a Railtie with the latest TS changes.
Push core delta logic back to TS.
Merge remote-tracking branch 'origin/edge' into edge

Conflicts:
	lib/thinking_sphinx/deltas/delayed_delta/flag_as_deleted_job.rb
Merge branch 'edge'; commit 'c00198285343c38b71bb3c2de59a07d73dfcd3a0'