[meta,cmake] Restructure project and introduce CMake tooling

Rearrange project to conform to current best-practices in modern C++ repo organization.

Introduce initial configuration file for the CMake meta-build system, based on the restructured organization.

cmake/FindJSON.cmake

+# - Find json
+# Find the native JSON headers and libraries.
+# This module defines
+#  JSON_INCLUDE_DIRS - the json include directory
+#  JSON_LIBRARIES    - the libraries needed to use json
+#  JSON_FOUND        - system has the json library
+#
+#  Copyright (c) 2013 Mathieu Malaterre <mathieu.malaterre@gmail.com>
+#
+#  Redistribution and use is allowed according to the terms of the New
+#  BSD license.
+#  For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+
+# See:
+# https://github.com/json-c/json-c/wiki
+# $ sudo apt-get install libjson0-dev
+# in sid:
+# $ sudo apt-get install libjson-c-dev
+
+cmake_minimum_required (VERSION 3.0)
+
+#[[
+Debian and Ubuntu have json-c in /usr/include/json-c and jsoncpp in /usr/include/jsoncpp/json
+Arch and Fedora have json-c in /usr/include/json-c and jsoncpp in /usr/include/json
+Searching for json_c_version.h avoids finding json.h of jsoncpp.
+]]
+find_path(JSON_INCLUDE_DIR NAMES json_c_version.h json.h PATHS /usr/include/json-c /usr/include/json)
+find_library(JSON_LIBRARY NAMES json-c json libjson json-glib PATHS /usr/lib64)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(JSON DEFAULT_MSG
+        JSON_LIBRARY JSON_INCLUDE_DIR
+)
+
+if(JSON_FOUND)
+    set(JSON_LIBRARIES ${JSON_LIBRARY})
+    set(JSON_INCLUDE_DIRS ${JSON_INCLUDE_DIR})
+endif()
+
+mark_as_advanced(
+        JSON_LIBRARY
+        JSON_INCLUDE_DIRS
+)
\ No newline at end of file