jordyn/sicpsgjd

jordyn 915932783c 2.5 generic operations		4 lat temu
..
1	71be3e28ce 2.1 data abstractions	4 lat temu
2	af15314046 2.2 hierarchical data and closure	4 lat temu
3	e7922f6b37 2.3 symbolic data	4 lat temu
4	a6f2fe353b 2.4 abstract data	4 lat temu
5	915932783c 2.5 generic operations	4 lat temu