Add separate Procfile with Webpack assets process

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Update INSTALL doc to use foreman

[ci skip]

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Tell Teatro to use development Procfile

[ci skip]

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Test that export options respect relative URL
Respect relative URL for export options
Stop premature update of membership data
Merge pull request #2200 from opf/feature/dev-procfile

Add a development Procfile, document in INSTALL
Merge pull request #2246 from opf/hotfix/17510_premature_update_of_membership_data

17510 Stop premature update of membership data
Merge pull request #2243 from opf/hotfix/17484_export_options_do_not_respect_relative_url

17484 export options do not respect relative url
Merge branch 'release/4.0' into dev

Signed-off-by: Alex Coles <alex@alexbcoles.com>

Conflicts:
	frontend/app/helpers/path-helper.js
	frontend/app/helpers/url-params-helper.js
	karma/tests/helpers/url-params-helper-test.js
fail gracefully if gon not loaded on some pages
Merge pull request #2257 from opf/fix/gon_not_defined_on_some_pages
Respect relative URL for relation auto-completion
Document disabling worker process in INSTALL

[ci skip]

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Tell git to ignore .foreman files

[ci skip]

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Merge pull request #2259 from opf/feature/dev-procfile

Document disabling worker process in INSTALL
Merge pull request #2244 from opf/hotfix/17485_relation_autocomplete_broken_with_relative_url

17485 Relation auto-completion broken with relative URL
clarify specification

[ci skip]
Merge branch 'release/4.0' into dev

Signed-off-by: Alex Coles <alex@alexbcoles.com>

Conflicts:
	frontend/app/helpers/path-helper.js
	frontend/app/work_packages/view_models/common-relations-handler.js
Move Protractor tests to frontend/tests/integration

See 6ec5ca58.

Signed-off-by: Alex Coles <alex@alexbcoles.com>