adding a BundlePathTagHandler to provide the path for bundle URLs from index.html
changing dev request API to be the same as prod
changing AppVersion content plugin to output the BundlePath instead
replacing AppVersion service with a BundlePath service for calculating bundle paths
Merge branch 'develop' into more-versioned-url-changes
fixing bug where stripping readers would wrongly remove content if it spanned 2 read blocks
allowing extra whitespace at the end of tags - fixes #653