refactor util lib code

[coryrylan]

Currently it is not easy to share util shared code between libraries. Currently the project has duplicated code across libs.

Possible but not great solutions

• symlink a util lib
• publish a util lib
• combine all libs into a core instead of stand alone packages (last resort, not ideal)

https://github.com/dherges/ng-packagr/issues/358

[jaypal412]

Hi coryrylan, Nice plugin, I like this one but I need one help like how we can change the step to 1.5 or .5