check_data_package: Check whether to install USAboundariesData and install if necessary
Description
If the USAboundariesData package is not installed, install it from the
Usage
check_data_package()
Arguments
Value
No return value, called for side effects: if USAboundariesData is
not installed or a newer version is required, a console message will appear
asking to install USAboundariesData. Else nothing will return.