Fortunately a helpful guy gave me your bootloader 1.3 beta, which fixes the problem with nonworking bootloader commands. It seems I was not the first one asking you...
For all others trying the bootloader commands in bootloader 1.1 : this does not work at all, and you are only wasting your time.
I would really appreciate if the code for bl 1.3 was on github also. I do not mind if its beta only...
Below the working debug output for a reassign nodeid 8 --> nodeid 88
16.01.2016 23:06:46 RX 8;255;3;0;9;0108A000B9F7FFFEDA7221F0001E950F09
16.01.2016 23:06:48 RX 0;0;3;0;9;read: 8-8-0 s=255,c=4,t=0,pt=6,l=10,sg=0:1E00010048047AA801
16.01.2016 23:06:48 INFO BL version=259
16.01.2016 23:06:48 INFO Executing bootloader command section
16.01.2016 23:06:48 TX 8;255;4;0;1;0200580000007ADA
16.01.2016 23:06:48 RX 8;255;4;0;0;1E00010048047AA80103
16.01.2016 23:06:48 RX 0;0;3;0;9;send: 0-0-8-8 s=255,c=4,t=1,pt=6,l=8,sg=0,st=ok:02005800000
16.01.2016 23:06:48 RX 0;0;3;0;9;read: 88-88-255 s=255,c=3,t=7,pt=1,l=1,sg=0:0