Added detection for Scilab language

test/fixtures/scilab_function.sci

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+// A comment with whites    and tabulations
+// Email: <scilab.support@scilab.org>
+// Scilab editor: http://www.scilab.org/
+function [a, b] = myfunction(d, e, f)
+	a = 2.71828 + %pi + f($, :);
+	b = cos(a) + cosh(a);
+	if d == e then
+		b = 10 - e.field;
+	else
+		b = "		test     " + home
+		return
+	end
+	myvar = 1.23e-45;
+endfunction

test/fixtures/scilab_script.sce

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+disp(%pi);
+

test/fixtures/scilab_test.tst

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+assert_checkequal(1+1,2);
+assert_checkfalse(%pi==%e);
+