change version to 1.0.0
Revert "fix difficulty algorithm"

This reverts commit b5c07e9eb1fb914cea985c198cc1a4cdf57333d7.
Revert "change difficulty algorithm to digishield 2.9.3"

This reverts commit 353b0dd225655a566c0ab9c7346c936c435153c2.
fix difficulty algorithm