Make it more obvious how to import sample data for new accounts.

Small onboarding improvements (growthbook#193)

* Added first name to user accounts
* Adjusted font sizes on welcome pages

Removed noindex from docs site

Added the ability to delete segments and dimensions (growthbook#128)

* Added the ability to delete segments and dimensions
* Unified delete flows around the DeleteButton component. Improved the DeleteButton to accept dynamic content

Fix Docker image at python 3.9 (scipy broken in python 3.10)

Fix notebook error when using old metrics. Add config.yml docs for no…

…tebookRunQuery

Dimensions based on extra experiment columns (growthbook#65)

* Dimensions based on extra select columns
* Clean up directions on data source query form
* Remove need for users SQL query

Customize Metric Conversion Windows (growthbook#52)

Add mysql/mariadb datasource support (growthbook#35)

Add guardrail metric support. (growthbook#30)