r2-bindings: disable perl for now to avoid deps
adding --tags to urlwatch for vit and shellnoob
make: define non target related vars with ?=

this also avoids having them in the make autocompletion
make: adding perl-term-extendedcolor from AUR
make: move 2-bindings dependency target to the top
perl-term-extendedcolor: adding initial version from AUR
urlwatch: adding perl-term-extendedcolor