update readme.txt
SettingsDialog refactoring
AboutDialog refactoring
use QInputDialog instead of InputOAuthPinDialog
set window icons
TweetDialog refactoring
MemoryDialog refactoring
set role to menu items
improve image pixel manipulation
simplify isDesiredScreen method
replace strcpy to normal QString code
Merge branch 'master' of https://github.com/task-jp/KanmusuMemory into task-jp-master
move to the constructor configuration of authentication information

Because settings in the main window is not enough for a call of
'TweetDialog :: showEvent'
change fleet detial format png to jpg
change temporarily processing of tweet after
update japanese words