Update git/_gitconfig

Add 1 alias "git d" for "git diff"
Update git/_gitconfig

New alias for git checkout
Update zsh/_zshrc

Add usefull comment
Big update in Vim config.

On branch master
	new file:   .gitignore
	new file:   .gitmodules
	modified:   README.md
	renamed:    git/_gitconfig -> git/.gitconfig
	renamed:    screen/_screenrc -> screen/.screenrc
	renamed:    textmate/_tm_properties -> textmate/.tm_properties
	new file:   vim/.vim/autoload/pathogen.vim
	new file:   vim/.vimrc
	deleted:    vim/_vim/.netrwhist
	deleted:    vim/_vim/.vimrc
	deleted:    vim/_vim/colors/wombat256.vim
	deleted:    vim/_vim/ftplugin/c.vim
	deleted:    vim/_vim/ftplugin/php.vim
	deleted:    vim/_vim/ftplugin/python.vim
	deleted:    vim/_vim/plugin/comments.vim
	deleted:    vim/_vim/plugin/phpfolding.vim
	deleted:    vim/_vim/plugin/project.vim
	deleted:    vim/_vim/syntax/javascript.vim
	deleted:    vim/_vim/syntax/php.vim
	deleted:    vim/_vim/tags/filename
	deleted:    vim/_vimrc
	new file:   vim/pathogen
	renamed:    zsh/_zshrc -> zsh/.zshrc
Add submodule in the git repository.

On branch master
	modified:   .gitignore
	new file:   vim/.vim/bundle/closetag
	new file:   vim/.vim/bundle/command-t
	new file:   vim/.vim/bundle/delmitmate
	new file:   vim/.vim/bundle/nerdtree
	new file:   vim/.vim/bundle/solarized
	new file:   vim/.vim/bundle/tagbar
Update the install part with pathogen.

On branch master
	modified:   .gitmodules
	modified:   README.md
	new file:   vim/.vim/autoload
	deleted:    vim/.vim/autoload/pathogen.vim
Typo edit.
Clean comments and install part.

On branch master
	modified:   .gitignore
	modified:   README.md
	deleted:    vim/.vim/autoload
Add expandtab in Vim.

On branch master
	modified:   vim/.vimrc
Add Sublime Text 2 config.

On branch master
	new file:   sublimetext2/config
Add Snipmate module.
starting to normalize snipmates
Add comments.

On branch master
	modified:   README.md
Add some comments in the README.

On branch master
	modified:   README.md
Add Vagrant config.

On branch master
	new file:   vagrant/Vagrantfile
Add Twig support.

On branch master
	new file:   vim/.vim/bundle/twig/README.markdown
	new file:   vim/.vim/bundle/twig/ftdetect/twig.vim
	new file:   vim/.vim/bundle/twig/ftplugin/twig.vim
	new file:   vim/.vim/bundle/twig/readme.md
	new file:   vim/.vim/bundle/twig/snippets/twig.snippets
	new file:   vim/.vim/bundle/twig/syntax/twig.vim
	new file:   vim/.vim/bundle/twig/vim-twig-addon-info.txt
	modified:   vim/.vimrc
Add ignore files for NERD Tree.

On branch master
	modified:   vim/.vimrc
Add screenshot in the README file.

On branch master
	modified:   README.md
	new file:   _documentation/Screen_001.png
Bug fix.

On branch master
	modified:   README.md
Bug fix (part 2).