More tidy up of the Javascript tracker section following AB feedback: 1. Moved "modifying Snowplow js" to tech docs from setup 2. Removed ambiguity in references to setting up campaign tracking (now part of core setup flow) 3. Clarified links from setup guide to tech docs broke setup flow
updated javascript tracker setup to include more information on testing (following feedback from alex brown)
updated SnowPlow -> Snowplow
tidying up breadcrumbs across pages
more tidying up of javascript setup documentation
more updates to tracker setup section
started to work through tracker setup section of wiki
renamed directory structure and tidied up setup overview page some more