Fixed some broken internal links.
Added a full description of derived metrics.
Added a warning about data availability.
Merge pull request #9 from TrackMaven/analytics-business-review

Documentation fixes for Analytics API
removing license page.
Merge branch 'master' of github.com:TrackMaven/api-docs

Conflicts:
	mkdocs.yml
TrackMaven API Docs by Wade Hams
Merge pull request #12 from TrackMaven/theme-tweaks

TrackMaven API Docs Theme styling and Gulp
wip - progress to adding docker to api-docs.