1. The windows dll will output the lib and dll, and rename the static
    lib will have conflict on windows.
2. Delete rename code to dismiss the conflict.

Fixed typos

Add fuzzers from OSS-Fuzz

Avoid uninitialized variable warnings

Fix json_object_object_foreach to avoid uninitialized variable warnings
using ANSI C or MSC.

Also try to accomodate formats to explicitly exclude the decimal (e.g. %.0f).

json_object_private: Use unsigned 32-bit integer type for refcount

json_object: Avoid double free (and thus a segfault) when ref_count gets < 0

Makefile: Add ACLOCAL_AMFLAGS

Fix non-GNUC define for JSON_C_CONST_FUNCTION

This is recommended by the libtool manual.

json_object: Add size_t json_object_sizeof()

doc: Use other doxygen feature to specify mainpage

Previously a special tag was added to README.md to make this the
main page in Doxygen generated docs. When viewing the README on the
GitHub page this tag was not hidden.

After upgrading to Doxygen 1.8.8 (and above) in changeset
219025727d a new Doxygen feature can be
used to specify the main page: Since release 1.8.3 Doxygen has a special
option to set a markdown file as main page. When using this option we
can drop the tag, making the README rendered by GitHub nice to look at.

Fixes: ae66b24369

Also, add a table of contents, and a brief section on using json-c with links to
the header files most likely to be useful.

Fix a VS 2015 compiler warning.