punctuator: fix a warning.
CMakeLists.txt: add option ENABLE_LOGGING.
ascii_composer: clear input when switching mode; handle Eisu_toggle key.
add new fields to RimeStatus.
dict_compiler: rebuild prism without dict source.
Merge remote-tracking branch 'origin/develop' into msvc10

Conflicts:
	include/rime/common.h
	src/gear/ascii_composer.cc
	src/segmentation.cc
vcbuild.bat: add option 'nologging'.
Merge branch 'develop' into msvc10