Update README.markdown
Spectrum doc
Components diagram.
vttablet module diagram
Cropped diagrams
Vision document.
Update Vision.markdown
Diagram update.
Merge branch 'master' of github.com:youtube/vitess
Update Vision.markdown
Journey diagram.
Merge branch 'master' of github.com:youtube/vitess
Create Tools.markdown
Update Tools.markdown
Update Tools.markdown
Update Tools.markdown
Update Tools.markdown
Update Tools.markdown
Update Tools.markdown
Delete VitessJourney.png