install.zsh: checkFile and checkDir fns
install.zsh: silly ;
install.zsh: using checkFile on tmux()
install.zsh: clearing messages
install.zsh: migrated git fn to zsh
install.zsh: check{Dir,File} support 2nd arg
install.zsh: powerline() migrated to zsh
install.zsh: docs to lnFile, checkDir and checkFile
install.zsh: completely migrated to zsh