cleans up the idea folder and adds gitignore

merges yoursi changes to git tutorial.

.gitignore

@@ -2,3 +2,4 @@
 *.pdf
 *.docx
 .~lock*
+.idea/

learning_git.md

@@ -1,19 +1,50 @@
 # Git
 
+Git is a Version Control System.
+It is an advanced open source project.
+That is the most popular VCS with his advantage like security, efficiency, speed etc.
+He was developed in 2005 by Linus Torvalds, the Linux's father.
+Many companies projects using Git (Google, Gnome, Netflix, etc).
+In 2016 12 million people were using Git.
+
+All project histories were saved in the work file.
+You can publish, with all histories, projects in a Git platform like Gitea, GitHub, Bitbucket, GitLab, etc.
+With this tool, you can commit projects, compare projects.
+That is the best tool for teamwork.
+
 ## Git in Pycharm
 
 ### Starting a version controlled project
 
+In Pycharm, you have to enable a version control integration. 
+There are many choices, but we will use Git.
+As you can see, Git appears in the toolbar and a git window appear bottom of the window.
+And you can identify the current branch that you are in.
+So the default branch name is **master**.
+
 ![screenhot](assets/git_pycharm_source_00.png)
 
 ![screenhot](assets/git_pycharm_source_01.png)
 
 ![screenhot](assets/git_pycharm_source_02.png)
 
+Let's try to write some code 
+And add all contents that we write in a git repository.
+
 ![screenhot](assets/git_pycharm_source_03.png)
 
+In the commit window, we can see file project. 
+But we had three important things.
+We have a textBox and two buttons.
+In the textBox, you can write a comment when you commit.
+The _Commit_ button is used to save all change in your project.
+The _Commit and Push_ is used to commit and push the project in a Git.
+
 ![screenhot](assets/git_pycharm_source_04.png)
 
+When you press the _Commit and Push_, a new window appears. 
+You can see which branch and which commit that you push.
+
 ![screenhot](assets/git_pycharm_source_05.png)
 
 ![screenhot](assets/git_pycharm_source_06.png)