added CPU usage plugin
added CPU usage plugin

omgmog/bitbar,kebno/bitbar,oleander/bitbar,oleander/bitbar,MatzFan/bitbar,pldubouilh/bitbar,0wnrepo/bitbar,matryer/bitbar,oleander/bitbar,matryer/bitbar,mralexgray/bitbar,naddeoa/bitbar,naddeoa/bitbar,pldubouilh/bitbar