added some comments

Author Solvaring <brandon.wall0711@gmail.com>
Author date 2017-07-07 06:39:29
Author local date 2017-07-06 23:39:29 -0700
Committer Solvaring <brandon.wall0711@gmail.com>
Committer date 2017-07-07 06:39:29
Committer local date 2017-07-06 23:39:29 -0700
Commit 592ccdd1787257bbc9c9c7fa9b6d47afd623921b
Tree 2c0f8008f33cf5577308d77f9b01a1ea2fef7730
Parent 6f32073860dafded8c865cef15e3ecbbba211cf2
added some comments