GenMarkdownTreeCustom has a way to a header (filePrepender arg), however there is not a first class way to add a footer.

The environment variables in the scripts/deploy_website.sh script assume a Travis environment and will need to be adjusted.

Is your feature request related to a problem? Please describe.
Flags for refresh (refresh rate), iterations and type should be added to export command.

Describe the solution you'd like
In cmd/export.go non-persistent flags for refresh, iterations and type should be added and used similar to how refresh rate and pid flags are added to cmd/proc.go.

envctl init should have an option for adding the .envctl directory to .gitignore.

If the option isn't set, we should probably tell the user to go ahead and do it manually.