Os name detection was improved.

	modified:   cmd/core/mkenv.groovy
Layout of 'GmanTemplate.groovy' was improved.

	modified:   src/main/groovy/gluefix/core/template/GmanTemplate.groovy
PowershellSetenvTemplate was improved.

	modified:   src/main/groovy/gluefix/core/template/PowershellSetenvTemplate.groovy
'mkcmd.groovy' was renamed into 'addcmd.groovy'.

	renamed:    cmd/core/mkcmd.groovy -> cmd/core/addcmd.groovy
Due to the renaming of the cmd files the content of the cmd wrapper files were changed, too.

	modified:   cmd/cmdw
	modified:   cmd/cmdw.ps1