Revert "Changed HTML header for weekday usages graph"

This reverts commit ba541de09a2070ff959c524e4299846a47519b2c.
Revert "Added percentile summaries for weekday bike usage"

This reverts commit 5dc0f7a13a89a9ee221a00c10cfe8c50982d9ff9.
Added switch to tern on percentiles graph

This reverts commit 2ef95ea2bf4ad40463ea9da84ee59287d5c9abd6.