Update git config

[pocky]

Add ignorecase

git config --unset-all core.ignorecase && git config --system core.ignorecase false

Update ~.gitconfig

[core]
        excludesfile = /home/vagrant/.gitignore_global
        editor = vim
[mergetool]
        keepBackup = true
[color]
        ui=auto
[color "branch"]
        current = yellow reverse
        local = yellow
        remote = green
[color "diff"]
        meta = yellow
        frag = magenta
        old = red
        new = green
[color "status"]
        added = green
        changed = yellow
        untracked = red
[apply]
        whitespace = fix
[alias]
        sup = submodule foreach "git pull origin master"
        lg = log --color --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit --
[push]
        default = current
[web]
        browser = chromium-browser