Move from Jansson to JV - proper freeing of memory

A few more tests, now passes valgrind.

c/testdata

@@ -76,6 +76,27 @@ null
 2
 3
 
+1,1
+[]
+1
+1
+
+[.]
+[2]
+[[2]]
+
+[[2]]
+[3]
+[[2]]
+
+[{}]
+[2]
+[{}]
+
+[.[]]
+["a"]
+["a"]
+
 [(.,1),((.,.[]),(2,3))]
 ["a","b"]
 [["a","b"],1,["a","b"],"a","b",2,3]
@@ -118,7 +139,7 @@ null
 
 1+1
 null
-2.0
+2
 
 .+4
 15
@@ -143,11 +164,17 @@ def f: (1000,2000); f
 1000
 2000
 
-# test backtracking through function calls and returns
-# this test is *evil*
-[[20,10][1,0] as $x | def f: (100,200) as $y | def g: [$x + $y, .]; . + $x | g; f[0] | [f][0][1] | f]
-"woo, testing!"
-[[110.0, 130.0], [210.0, 130.0], [110.0, 230.0], [210.0, 230.0], [120.0, 160.0], [220.0, 160.0], [120.0, 260.0], [220.0, 260.0]]
+([1,2] + [4,5])
+[1,2,3]
+[1,2,4,5]
+
+true
+[1]
+true
+
+[1,2,3]
+[5,6]
+[1,2,3]
 
 def f(x): x | x; f([.], . + [42])
 [1,2,3]
@@ -160,3 +187,9 @@ def f(x): x | x; f([.], . + [42])
 def id(x):x; 2000 as $x | def f(x):1 as $x | id([$x, x, x]); def g(x): 100 as $x | f($x,$x+x); g($x)
 "more testing"
 [1,100,2100.0,100,2100.0]
+
+# test backtracking through function calls and returns
+# this test is *evil*
+[[20,10][1,0] as $x | def f: (100,200) as $y | def g: [$x + $y, .]; . + $x | g; f[0] | [f][0][1] | f]
+"woo, testing!"
+[[110.0, 130.0], [210.0, 130.0], [110.0, 230.0], [210.0, 230.0], [120.0, 160.0], [220.0, 160.0], [120.0, 260.0], [220.0, 260.0]]