git pull problem solving steps.
在git pull的時候遇到下面的問題：
error: Your local changes to the following files would be overwritten by merge:
init.el
Please, commit your changes or stash them before you can merge.
在網上搜索了下， 發現下面的步驟可以把問題解決掉， 雖然我不知道爲什麼：
git checkout HEAD init.el
git pull
Push code to a remote server
1. 如果之前已经有了一个original source， 应该先git remote rm origin
2. set up the remote repository:
mkdir my_project.git
cd my_project.git
git init --bare
git update-server-info # If planning to serve via HTTP
3. on local machine:
cd my_project
git init
git add *
git commit -m "My initial commit message"
git remote add origin git@example.com:my_project.git
git push -u origin master