Shiny Updates, USEPA, remove version number

[leppott]

Is your feature request related to a problem? Please describe. Shiny app updates for USEPA, remove version number from title

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[leppott]

Moved from title to "ABOUT" tab at the top before the first header. This is in the shiny code and not in RMD so it will stay current.
Added "version" to global.

[leppott]

[leppott]