Command Line Parsing

- Implemented Arguments::extract_command to locate the command
  keyword in an argument list.
- Implemented Arguments::extract_sequence to locate and remove an ID
  sequence from an argument list.
- Added unit test for extract_sequence.
- Stubbed all Argument::extract_<object> methods.
- Simplified code in (soon to be obsolete) Sequence.cpp.

test/CMakeLists.txt

@@ -6,10 +6,11 @@ include_directories (${CMAKE_SOURCE_DIR}
                      ${CMAKE_SOURCE_DIR}/test
                      ${TASK_INCLUDE_DIRS})
 
-set (test_SRCS att.t autocomplete.t color.t config.t date.t directory.t dom.t
-               duration.t file.t filt.t i18n.t json.t list.t nibbler.t path.t
-               record.t rx.t seq.t subst.t t.benchmark.t t.t taskmod.t tdb.t
-               tdb2.t text.t uri.t util.t variant.t view.t json_test)
+set (test_SRCS arguments.t att.t autocomplete.t color.t config.t date.t
+               directory.t dom.t duration.t file.t filt.t i18n.t json.t list.t
+               nibbler.t path.t record.t rx.t seq.t subst.t t.benchmark.t t.t
+               taskmod.t tdb.t tdb2.t text.t uri.t util.t variant.t view.t
+               json_test)
 
 add_custom_target (test ./run_all DEPENDS ${test_SRCS}
                                   WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/test)