Bump logstasher to 0.4.1

To get https://github.com/shadabahmed/logstasher/pull/17
Swap order of Gemfile source lines

To prefer gems from gemfury over rubygems.org in the case where a gem
exists on both.
Log GOVUK-Request-Id header
Pass GOVUK-Request-Id header on api interaction

https://github.com/alphagov/gds-api-adapters?#middleware-for-request-tracing
Merge pull request #496 from alphagov/pass-on-GOVUK-Request-Id-on-api-calls

Pass GOVUK-Request-Id header on api interaction
Merge pull request #495 from alphagov/log_request_id

Log GOVUK-Request-Id header
Revert "Swap order of Gemfile source lines"

This reverts commit 50283dd911950f9f72847cca753eac7ebb2087b4.

The search order is actually from last to first
Remove setting of slimmer campaign_notification header

This was removed from slimmer in alphagov/slimmer#54, and therefore this
will cause errors when slimmer is upgraded.
Merge pull request #497 from alphagov/remove_slimmer_campaign_notification

Remove setting of slimmer campaign_notification header
Bump slimmer to 3.25.0

To get GOVUK-Request-Id header passing
Merge pull request #498 from alphagov/bump_slimmer

Bump slimmer to 3.25.0
added beta link and text
Remove unicorn config.

This is now uploaded by the deploy scripts (and varies by server class).
Merge pull request #500 from alphagov/remove_unicorn_config

Remove unicorn config.
Merge pull request #499 from alphagov/beta-help

added beta link and text
Merge remote-tracking branch 'origin/master' into oil-and-gas-sector

Conflicts:
	Gemfile
	Gemfile.lock