Added signatures migration. Fixed some comments.
Added signatures migration.
Fixed some comments.

brandonshults01/otrs,noritnk/otrs,oiami/otrs,thorsteneckel/otrs,StCyr/otrs,thorsteneckel/otrs,mburggraf/otrs,eliasp/otrs,balazj/otrs,MBRG/otrs,moritz/otrs,xhoy/otrs,PortgasDAce/otrs,MBRG/otrs,mbeijen/otrs-1,s7design/otrs,linearregression/otrs,s7design/otrs,oiami/otrs,mburggraf/otrs,crythias/otrs,balazj/otrs,noritnk/otrs,oiami/otrs,linearregression/otrs,balazj/otrs,nilei/otrs,rudy500/otrs,crythias/otrs,moritz/otrs,StCyr/otrs,eliasp/otrs,rudy500/otrs,crythias/otrs,nilei/otrs,xhoy/otrs,muehlbauer/otrs,thorsteneckel/otrs,capeit-tto/otrs,StCyr/otrs,muehlbauer/otrs,linearregression/otrs,brandonshults01/otrs,brandonshults01/otrs,mburggraf/otrs,MBRG/otrs,moritz/otrs,balazj/otrs,xhoy/otrs,brandonshults01/otrs,rudy500/otrs,rudy500/otrs,xhoy/otrs,capeit-tto/otrs,muehlbauer/otrs,eliasp/otrs,moritz/otrs,oiami/otrs,vlascoder/otrs,muehlbauer/otrs,linearregression/otrs,crythias/otrs,PortgasDAce/otrs,StCyr/otrs,s7design/otrs,xhoy/otrs,oiami/otrs,brandonshults01/otrs,vlascoder/otrs,mbeijen/otrs-1,rudy500/otrs,balazj/otrs,nilei/otrs,capeit-tto/otrs,vlascoder/otrs,nilei/otrs,nilei/otrs,s7design/otrs,s7design/otrs,mburggraf/otrs,moritz/otrs,crythias/otrs,PortgasDAce/otrs,StCyr/otrs,eliasp/otrs,muehlbauer/otrs,MBRG/otrs,PortgasDAce/otrs,MBRG/otrs,eliasp/otrs,thorsteneckel/otrs,mbeijen/otrs-1,linearregression/otrs,mburggraf/otrs,PortgasDAce/otrs,noritnk/otrs,thorsteneckel/otrs