Removed $emk and $proj placeholders since they can be replaced with emk.emk_dir and emk.proj_dir in all cases. Changed the $build placeholder to $:build:$ so it can be replaced using a simple string.replace() (you can globally change the build placeholder as well).
Changed emk.emk_path to emk.emk_dir
Added link.static_libs and link.local_static_libs so you can add additional static libs (by path) that will be merged into the lib_in_lib (if desired) and will be linked into shared libs and executables.