Add Lobatto IIIa-c and Radau IIa solvers #61

Job	Run time
Tests (MIRK) / Tests - MIRK	19m 13s
Tests (MISC) / Tests - MISC	13m 0s
Tests (FIRK(NESTED)) / Tests - FIRK(NESTED)	19m 11s
Tests (FIRK(EXPANDED)) / Tests - FIRK(EXPANDED)	19m 10s
Tests (WRAPPERS) / Tests - WRAPPERS	6m 3s
Tests (SHOOTING) / Tests - SHOOTING	13m 19s
	1h 29m 56s

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