require.package: Require a package for use in the project
Description
This function will require the given package. If the package is not installed
it will stop execution and print a message to the user instructing them which
package to install and which function caused the error.
Usage
require.package(package.name)
Arguments
package.name
A character vector containing the
package name. Must be a valid package name installed on
the system.
Value
No value is returned; this function is called for its side effects.