Improve git installation instructions

Author: belandJibo

README.md

@@ -125,10 +125,10 @@ Homebrew installation is not supported. If you have issues with homebrew-install
 
 If you have `git` installed (requires git v1.7+):
 
-1. clone this repo in the root of your user profile
+\1. clone this repo in the root of your user profile
   - `cd ~/` from anywhere then `git clone https://github.com/creationix/nvm.git .nvm`
-1. check out the latest version with `git checkout v0.33.5`
-1. activate nvm by sourcing it from your shell
+\2. `cd ~/.nvm` and check out the latest version with `git checkout v0.33.5`
+\3. activate nvm by sourcing it from your shell: `source nvm.sh`
 
 Now add these lines to your `~/.bashrc`, `~/.profile`, or `~/.zshrc` file to have it automatically sourced upon login:
 (you may have to add to more than one of the above files)