Number fixes (#1053)

* cleaning up the logic for parsing numbers

* Add Testcases for new Reader in jsontestrunner

test/data/legacy_test_complex_01.expected

@@ -0,0 +1,20 @@
+.={}
+.attribute=[]
+.attribute[0]="random"
+.attribute[1]="short"
+.attribute[2]="bold"
+.attribute[3]=12
+.attribute[4]={}
+.attribute[4].height=7
+.attribute[4].width=64
+.count=1234
+.name={}
+.name.aka="T.E.S.T."
+.name.id=123987
+.test={}
+.test.1={}
+.test.1.2={}
+.test.1.2.3={}
+.test.1.2.3.coord=[]
+.test.1.2.3.coord[0]=1
+.test.1.2.3.coord[1]=2