Replace os.getresuid() so it works on Mac OS X.
Fix path creation.
Fix gpg binary path validation.
Fix validation of --verify argument using detached sig.
Fix GPGBase._homedir_setting docstring parameter name.
Fix whitespace indentation levels in _util.InheritableProperty class.
Merge branch 'hotfix/inheritable-property-whitespace' into develop
Merge branch 'hotfix/GPGBase-homedirsetter-docstring' into develop
Merge remote-tracking branch 'drebs/bug/fix-os.getresuid-not-supported-on-os-x' into develop