blog: Make X less annoying

Two new custom CSSes to get rid of some web mistakes:

Instagram:

body   { overflow: auto !important; }
.tHaIX { display: none !important; } /* no "please login" footer */
.RnEpo { display: none !important; } /* no login pop up */
._lz6s { display: none !important; } /* no login/register header */ 

Facebook:

._5hn6 { display: none !important; }             /* no login footer */
._1pfm { display: none !important; }             /* no like, share, send message */
._57dz { display: none !important; }             /* no side column */

I’ve also made a new git repo to track changes.