some links in top-level docs in the forrest-0.8 release refer to 0.7 docs

I thought that i had normalised all "site:" references in xdocs during the lead-up to the release. However, some remain, e.g. in xdocs/index.xml the reference "site:v0.70//your-project" should be simply "site:your-project".

Files containing such problem links are:
index.xml
contrib.xml
dtdx/document-v11.xml
dtdx/document-v12.xml
flyer.xml
guidelines.xml
docs_0_80/faq.xml (only one problem link).

These will be fixed immediately following the release.