.gvimrc: Set colorscheme to solarized
.gvimrc: Set font to Ricty
install.sh: Print usage only without no argument
*.sh: Change the shell to bash
install.sh: Add machine specific variables
install.sh: Extract duplicated sequence from both link and unliink to link_impl
install.sh: Select directory to link .vim whether $mingw or not
install.sh: Sort DOT_FILES
install.sh: Rename $HOME to "~"
install.sh: Change "./" to "$CWD/"
install.sh: Delete unnecessary line
Rename install.sh to setup.sh