Util for maintaining files with smack accesses

Hi,

I moved here the pull request from branch smack-1.0. ( https://github.com/smack-team/smack-1.0/pull/1 ), with changes, that were asked for there (I decreased number of new API functions).

I undestand, that pulling this is dependent on unifying tizen's and libsmack's repositories. We are currently working on the issue.

Jan Cybulski
Samsung Electronics Co.