Initial commit of Rakefile
Add `percol` task in Rakefile
Add `zshrc` task
Fix multiple initialization of DEST_DIR constant
Set GIT_USERNAME and GIT_EMAILADDR during `gitconfig` task
Update percol configuration
Move percol-related scripts to percol directory
Move percol.d to percol directory
Merge branch 'percol' of https://github.com/takashiyoshida/dotfiles into deploy
Move all scripts to scripts directory