translator: support namespaces.
dictionary: create dictionaries by tickets.
refactor rime::Memory.
compare translations by quality of candidates.
Merge branch 'parallel_translators'
rename r10n_translator to script_translator.
ascii_composer: fix googlecode Issue 401, unexpected mode switching with Caps Lock.
dict_compiler: support multiple source table files.
user_dictionary: {dictionary: x.y} implies {user_dict: x}
user_dictionary.cc: reformat code.
deployer: work thread for ordinary background tasks.
user_dictionary: recover damaged userdb in work thread.
refactor user_db.
decouple user_dictionary and user_db by making Db a rime class.
refactor db.
refactor db.
add text_db.
extract class UserDbValue.
tsv reader/writer.
fix clang build.