* src/calc.c, src/eval.c, src/funclib.c, lib/*/*.gel: fix some
	  spelling and capitalization

	* help/C/gel-function-list.xml: fix spelling

	* combinatorics/recursive_sequences.gel: Fix LinearRecursiveSequence,
	  and also allow it to take matrix argument

	* src/geniustests.txt: add a few tests

	* help/C/*.xml: Fixes from Luc Pionchon that I totally forgot about
	  for 1.0.15