Code Migration

- Migrated taskd JSON parser into task, to provide encode/decode
  capability to Task::composeJSON.
- Migrated taskd utf8 code, replacing old unused code.
- Added unit tests or JSON.
- Migrated Tree updates from taskd.

test/CMakeLists.txt

@@ -6,7 +6,7 @@ include_directories (${CMAKE_SOURCE_DIR}/src
 set (test_SRCS date.t t.t tdb.t duration.t t.benchmark.t text.t autocomplete.t seq.t
                record.t att.t stringtable.t subst.t nibbler.t filt.t cmd.t config.t
                util.t color.t list.t path.t file.t grid.t directory.t rx.t taskmod.t
-               lisp.t rectangle.t sensor.t tree.t tree2.t uri.t)
+               lisp.t rectangle.t sensor.t tree.t tree2.t uri.t json.t)
 
 add_custom_target (test ./run_all DEPENDS ${test_SRCS}
                                   WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/test)