bug fix caused stress.py to run in an ifinite loop?
Merge branch 'master' of https://github.com/archii/piuss
refactored displaypuz references
removed commented referance to displaypuz; removed unused variable myrange_chk_cnt; replaced puz references with Puz().puz references; replaced numberl references with Puz().filledl references
removed unused imports/variable; removed puzfns.loadpuz and puzfns.displaypuz references; used the Puz() class to replace the load/display functions
removed puzfns.displaypuz -- it is no longer used; removed unused references from puz.py; removed displapuz refernces from test_all and started testing Puz() methods in test_all instead