Added minimal failing test for hnoether
Merge pull request #290 from jankoboehm/spielwiese

Added minimal failing test for hnoether
Fixed the usage pattern for StringEndS
Moved p_IsOne  to p_polys
Fixed the handling of constant (non-1) denoms
fix: nlPower with exp==0 return 1
fix: ntDiv: normlization of .../(-1)