Added section on git status & git log.

gitcli-basics/README.md

+# Git Command Line Basics
+
+All Git commands start with the `git` "main" command followed by a keyword matching the Git operation to be performed. Running Git commands only works inside folders that belong to a (local) Git repository.
+Trying to run Git commands outside a Git repository folder will generate an error message.
+
+[This index](https://git-scm.com/docs) lists all the available commands with links to extensive documentation.
+
+## Displaying information about a local repository
+
+The `git status` [command](https://git-scm.com/docs/git-status) displays information about the current status of the local repository:
+  - What is the current branch ?
+  - If it is related to a remote branch, have any modifications been made on either side ?
+  - What has happend to the files and folders of the local repository ?
+
+On a freshly cloned repository, the output of `git status` looks like:
+
+  ![status_initial.png](./media/status_initial.png)
+
+The `git log` [command](https://git-scm.com/docs/git-log) details all the operations that have been performed on the current branch since it was created, crouped by commits. `git log` provides many many options to customize the output.
+
+On the freshly cloned example repository, the output of `git log` looks like:
+
+  ![log_initial.png](./media/log_initial.png)  
+  
+
+
+