Merge PR99 and its fixes to support parsing Information Object and Information Object Set

This is a collection of works :

1. Based on @zhanglei002's pull request 99.

2. A fix by @AuthenticEshkinKot and merged by @mouse07410 at
   commit 2c8d366bbe1fc4e4c041e9b0eb9779f8a42d754b of https://github.com/mouse07410/asn1c
   to support parsing of Information Object and Information Object Set

3. A fix by @Uri Blumenthal in asn1fix_derefv.c at :
   commit ec0ade4f87c807e763e3f35fc5466adb6dda3473 of https://github.com/mouse07410/asn1c
   to solve crash on asn1p_value_free().

4. My pull request 18 to @mouse07410's https://github.com/mouse07410/asn1c to solve
   problems found during parsing ASN.1 modules of S1AP, RANAP and J2735-201603.

5. My pull request 22 to @mouse07410's https://github.com/mouse07410/asn1c to solve issue 147
   and to solve the problem during parsing ASN.1 module of NBAP.

6. My pull request 23 to @mouse07410's https://github.com/mouse07410/asn1c to fix memory leakage
   introduced in aforementioned commits.
   Most code changes are the same as pull request 153 to this repository.

7. A fix of my bug in item 6 which result asn1c crash, fixed by @mouse07410.
diff --git a/libasn1parser/asn1p_class.h b/libasn1parser/asn1p_class.h
index 571be61..893dec3 100644
--- a/libasn1parser/asn1p_class.h
+++ b/libasn1parser/asn1p_class.h
@@ -12,6 +12,7 @@
 	struct asn1p_ioc_cell_s {
 		struct asn1p_expr_s *field;	/* may never be NULL */
 		struct asn1p_expr_s *value;	/* may be left uninitialized */
+		int new_ref;
 	} *column;
 	int columns;
 	int max_identifier_length;
@@ -48,6 +49,8 @@
 
 typedef struct asn1p_wsyntx_s {
 
+	struct asn1p_wsyntx_chunk_s *parent;
+
 	TQ_HEAD(struct asn1p_wsyntx_chunk_s) chunks;
 
 } asn1p_wsyntx_t;