configuration 'modules' added to BusyConfig

[nelisbijl]

it corresponds to DynamicComponent's componentModules attribute it is needed when a specified custom template contains Component(s) from other modules

PS: not sure whether the build script is supposed to generate the complete build folder. Didn't work for me. Added typescript compile scripts and separate tsconfig.json for src and demo. They are separated because demo uses the *.d.ts files in build\src as input. tsc won't overwrite those d.ts files when src and demo are build together.