Android build system

Added a bunch of missing HAVE_* defines

array_list_expand_internal needs length, not index.

Add missing casts from void* and replace #if HAVE_X with #ifdef HAVE_X

(The current implementation will fail when adding index 65.)

Thanks for Mateusz Loskot for the fix.

Extend the run_output_test() function so we actually can pass command line
 parameters and so we can support different output files for the same test
 executable.
Also provide some hints about what to do if a test fails (i.e. set VERBOSE=1).

There are now three options: JSON_C_TO_STRING_SPACED, JSON_C_TO_STRING_PLAIN and JSON_C_TO_STRING_PRETTY.
This also add a json_object_to_file_ext() that takes the same flags.
Existing output of json_object_to_json_string() is unchanged, and uses JSON_C_TO_STRING_SPACED.
Thanks fo Grant Edwards for the initial patches.

This dependson the Androgenizer project, which helps keep autofoo-based build
systems in sync with the Android build.

This is convention in most open source projects.

This allows systems certain types of build setups to work. Specifically, this
will help when building on Android and using json-c as a dependency for another
package.

that, since not all environments actually have a stdbool.h to use.

Clean up documentation and correct sample code

Fix missing inttypes.h definitions for Visual Studio 2010 and earliers. ...

Add new iterator implementation and some NULL-pointer safety

Additional explanatory comments

New json_object_object_get_ex() method protects itself against null pointers
and invalid objects being passed in.

New lh_table_lookup_ex() method protects itself against null pointers
and invalid objects being passed in.