add.dependency: Private function that adds a package to the list of...
In yhatr: R Binder for the Yhat API

Private function that adds a package to the list of dependencies that will be installed on the ScienceOps server

1	add.dependency(name, importName, src, version, install)

`name`	name of the package to be installed
`importName`	name under which the package is imported (for a github package, this may be different from the name used to install it)
`src`	source that the package is installed from (CRAN or github)
`version`	version of the package
`install`	whether or not the package should be installed in the model image