Don't require `--name` option, and allow multiple names, for `choco feature`

[ferventcoder]

#272 points to unintuitive command requirements

• Do not require -n for passing values to choco feature
• Allow multiple features to be passed with a single command

[alexchandel]

Not sure if the configuration option to prefer ".portable" or ".install" packages from #371 is applicable here, but hypothetically if more than two options (or an arbitrary number of options) were to exist, Choco Feature might need to handle sum types or strings.

[RichiCoder1]

:+1: On this.