- version is WM_PROJECT_VERSION prefix + SHA1 from current git head - move double quotes from make rules to global.Cver for extra safety
- added wmakePrintBuild -check, -update, -version options - only update .build cache when explictly requested and from within the wmake Cver rules - use -check option to avoid unnecessary remake in src/Allwmake
- the $WM_PROJECT_DIR/.build file is automatically updated. This file is (and must be) ignored by git.