tcgeneric

tcgeneric is used at run time in 7 crates.

Depender (with downloads and own rev deps)			tcgeneric version
380	6	tc-value		^0.4
330		tinychain		^0.4
330	5	tc-transact		^0.4
270	4	tc-btree		^0.4
270	3	tc-table		^0.4
230	2	tc-tensor		^0.4
	1	tc-math		^0.4