Issue #113: add "new" files to appropriate variables in Makefile, and note the need to run "make distcheck" as part of the release process.

Fix issues with the test script so it works under distcheck too.

Makefile.am

@@ -13,8 +13,8 @@ libjson_cinclude_HEADERS = \
 	bits.h \
 	debug.h \
 	json.h \
-	json_config.h \
 	json_c_version.h \
+	json_config.h \
 	json_inttypes.h \
 	json_object.h \
 	json_object_iterator.h \
@@ -22,14 +22,10 @@ libjson_cinclude_HEADERS = \
 	json_tokener.h \
 	json_util.h \
 	linkhash.h \
+	math_compat.h \
 	printbuf.h \
 	random_seed.h
 
-#libjsonx_includedir = $(libdir)/json-c-@VERSION@
-#
-#libjsonx_include_HEADERS = \
-#	json_config.h
-
 libjson_c_la_LDFLAGS = -version-info 3:0:0 -no-undefined @JSON_BSYMBOLIC_LDFLAGS@
 
 libjson_c_la_SOURCES = \