rt_gfrtchord: merge prior changes from rt_frtchord
rt_gfrtchord: merge prior changes from rt_frtchord

- fix create_entry/3
- new helper function to determine RT size
- retrieve rt using a message handler
- code style changes
digshock/scalaris,digshock/scalaris,digshock/scalaris,digshock/scalaris,digshock/scalaris,tectronics/scalaris,tectronics/scalaris,seyyed/scalaris,tectronics/scalaris,tectronics/scalaris,seyyed/scalaris,seyyed/scalaris,seyyed/scalaris,tectronics/scalaris,seyyed/scalaris,seyyed/scalaris,digshock/scalaris,seyyed/scalaris,tectronics/scalaris,digshock/scalaris,tectronics/scalaris