* Update embedded jsoncpp from unk version to 0.10.6
0.10.6 is last release without c++11
* Make jsoncpp more compliant with its amalgamate
Jsoncpp cpp file should be upper, make the library like it does in amalgamate
* Reorganization: move minetest embedded libs outside of source tree to /lib
* Fix a dead grep in LINT
* Move included json code to jsoncpp subdirectory
This is needed to avoid having to specify the minetest src directory
as a system include when fixing the json includes.
* Fix json includes
They used "", so that the compiler searches the project's directory
first. The result was that when compiling with a system jsoncpp,
the project's own version of json.h was still included, instead of
the system version.
The includes now use <>, so a system location, or one specified with
'-Ilocation' is searched only.
* Fix for jsoncpp deprecated function warning
When compiling with a newer version of jsoncpp (and
ENABLE_SYSTEM_JSONCPP=true), jsoncpp emits a warning
about a deprecated function that minetest uses.