Install : Not straight forward to install on Windows (Git-bash)

[geraudloup]

• [x] Install should be easy on Windows with standard install of git (which is git-bash) => one liner to copy-paste
• [x] It should not use make (which is not shipped with git-bash)
• [x] It should work to update the version (so install on already installed should update the version of git-standup
• [x] Documentation should be updated to relevant changes

[geraudloup]

$ curl -L https://raw.githubusercontent.com/kamranahmedse/git-standup/master/installer.sh | sh
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   273  100   273    0     0    128      0  0:00:02  0:00:02 --:--:--   128
Cloning into 'git-standup'...
remote: Enumerating objects: 16, done.
remote: Counting objects: 100% (16/16), done.
remote: Compressing objects: 100% (13/13), done.
remote: Total 16 (delta 1), reused 7 (delta 0), pack-reused 0
Receiving objects: 100% (16/16), 9.48 KiB | 3.16 MiB/s, done.
Resolving deltas: 100% (1/1), done.
sh: line 11: make: command not found
Clone failed with 127