Thanks a lot for the fast reply. Fist of all I have to say that the nodes you've create are massively good and useful for lots of productions.I am very motivated to learn all of them and get them into use in future. I've already fixed the problem.
What I did is that :
No matter that I don't have the shelf installed on the right place I've put the bundle on the right sport from there I've got the basic shelf with only 3 icons. I did click on the fist one and I notice all of the nodes are actually there. The next thing I did is going to the script editor and drag the command for a certain node into the shelf as MEL command and from there I found the icons and connected the icons.
For the Mac users struggling where to put the icons : /Users/THENAMEOFYOURCOMPUTER/Library/Preferences/Autodesk/maya/2013-x64/prefs/icons
There is a chance you are not seeing the Library folder so I will advice you to go to the Menu of Finder and on the "Go" bar there is "Go to Folder" command . There you type the up mentioned path and you will be straight into the folder.