[wildfly-dev] Powershell scripts

Hey guys, just heads up, I've managed to prepare[1] all powershell scripts to replace the aging .bat ones. New scripts unify most of the shared "code" that all scripts use by including common.ps1, and each script only has the code that differs from common behavior they all share. As result of move we now have much more reliable and faster scripts that share common code, which helps with maintaining a lot. New scripts (domain.ps1 & standalone.ps1) now support --background (also controllable via .conf.ps1) option that runs the process in background and remembers its pid and as such add support for feature that until now was only in *nix version of scripts. I would like to propose this PR for inclusion to WildFly 10. As it doesn't alter any existing behavior but just adds & improve the script experience on Windows. As we get to test and verify that new scripts don't break/include any currently available option/action I would also like to remove the batch scripts[2], so they would just do call out to their .ps1 counter parts. Once this scripts get merged, I will send PR to also add PS scripts for WildFly full defined scripts, given that most of the functionally is already in "common.ps1" new scripts will be just simple 5 liners [3] -- tomaz [1] https://github.com/wildfly/wildfly-core/pull/1118 [2] https://github.com/wildfly/wildfly-core/pull/1126 [3] https://github.com/ctomc/wildfly-core/blob/powershell/core-feature-pack/s...