UPDATE: added documentation and a few functions

git-svn-id: svn+ssh://svn.gersteinlab.org/repos/bioinfo/libmrf@691 2fd4de08-f6cc-4d2b-b124-baeea9ba92f3
UPDATE: added samParser_writeEntry


git-svn-id: svn+ssh://svn.gersteinlab.org/repos/bioinfo/libmrf@692 2fd4de08-f6cc-4d2b-b124-baeea9ba92f3