Change dependency to spree 2 stable
(cherry picked from commit 21f0d48d460fda7d726722fc29fa63d55a3e0362)

Signed-off-by: Tobias Bohwalli <hi@futhr.io>
Comment out aliases of obsolete methods
(cherry picked from commit b014bad6feebfff7e5f8101364571d1766a8f0d6)

Signed-off-by: Tobias Bohwalli <hi@futhr.io>
Updated gitignore.