added comments to explain comments_controller
added comments to explain comments_controller

namangupta01/osem,raluka/osem,hennevogel/osem,Shriyanshagro/osem,hennevogel/osem,bear454/osem,AndrewKvalheim/osem,namangupta01/osem,meonkeys/osem,bear454/osem,raluka/osem,kormoc/osem,sonalkr132/osem,Shriyanshagro/osem,ChrisBr/osem,kormoc/osem,namangupta01/osem,BelieveC/osem,ChrisBr/osem,SeaGL/osem,BelieveC/osem,AndrewKvalheim/osem,differentreality/osem,sonalkr132/osem,SeaGL/osem,kormoc/osem,raluka/osem,BelieveC/osem,rishabhptr/osem,rishabhptr/osem,sonalkr132/osem,hennevogel/osem,AndrewKvalheim/osem,rishabhptr/osem,differentreality/osem,openSUSE/osem,sonalkr132/osem,bear454/osem,ChrisBr/osem,openSUSE/osem,bear454/osem,Shriyanshagro/osem,meonkeys/osem,kormoc/osem,ChrisBr/osem,rishabhptr/osem,SeaGL/osem,hennevogel/osem,BelieveC/osem,raluka/osem,namangupta01/osem,meonkeys/osem,openSUSE/osem,differentreality/osem,Shriyanshagro/osem,differentreality/osem