CRAN v0.3.0

Prep CRAN update

Signed-off-by: Peter Solymos <psolymos@gmail.com>

CRAN-v0.2.0

CRAN release including variable substitution

CRAN-v0.1.5

value() by default coerces the config value to the same storage type as the default value when the default value is not NULL.

CRAN-v0.1.3

Allowing sub-commands before flags.

CRAN-v0.1.2

CRAN release including the new value() function.