bundle update
removed unused variables: lang resources.
removed unused variables: spec example
removed unused variables: default plugins
removed unused variables: libraries
removed unused variables: plugins
use underscore variable for unused assignments
Merge pull request #429 from tdiary/remove-unused-vals

使われてない変数を消しました
Hide `Unknown' from weather display
Merge pull request #430 from zunda/weather_hide_unknown

Hide `Unknown' from weather display
make branch
bundle update
move tDiary libraries into lib direcotry
fixed broken tests
root path is different from library path
use TDiary.root for external plugin files
use TDiary.root for fake plugin file
use TDiary.root for fake filter file
use TDiary.library_root insted of TDiary::PATH
removed version locked for rspec3