Pin ePDQ npm

- Removes node_modules from version control
- Fixes package.json updates
- Pins ePDQ to release_1 of the gds_master branch
Merge pull request #18 from alphagov/pin_epdq_module

Pin ePDQ npm
Merge branch 'master' into winazure_preview_deployment

Conflicts:
	node_modules/epdq/package.json
	package.json