Continued:

Continued:
- jcore-utils was splitted out from jcoreee to reduce project centralization
  (means you have to that whole fat bunch of classes but only use a few)
- these utility classes may also be used in JavaSE projects so better split
  them out as they are generic enough
- rename CoreNumberUtils to SafeNumberUtils as this class provides null-safe
  methods for any kind of Java numbers

Signed-off-by: Roland Häder <roland@mxchange.org>