exclude at least angular from optimized javascript build file

[marcorinck]

current optimization settings for requireJS turn mangle off, so variable names are not shortened because optimized javascript file contains ALL modules, even pre-minified angularJS which does not work anymore when mangle is off,

However, there is a special config option to exclude only some modules, as answered months ago on my own question on SO but I only saw it today:
http://stackoverflow.com/questions/16522216/how-to-exclude-certain-requirejs-files-from-uglifying-optimizing

doc is here:
http://requirejs.org/docs/optimization.html#empty