Fixed broken flag

Using "git config –-global alias.rb rebase" will result in
throw the following:
error: key does not contain a section: –-global

Instead, we should use "--global"
Merge pull request #32 from b-long/patch-1

Fixed broken flag
Add Ry's Git Tutorial
Unpublish all the posts
Translate all root HTML templates.
Translate basic layout HTML files.
Amend original category translations.
Complete translation for "smartly save stashes".
Update translator info in AUTHORS.
Change of style to address reader informally.
Fix the given category for "smartly-save-stashes".
Update tag visualization image
Merge pull request #36 from pdelre/patch-1

Update tag visualization image
Merge pull request #33 from ryanhodson/rys-git-tutorial

Add Ry's Git Tutorial
Merge pull request #34 from nicktoumpelis/el

Translate Git Ready into greek.
Revert "Merge pull request #33 from ryanhodson/rys-git-tutorial"

This reverts commit 35c992ef188655af5b11d0c8a05a1848a3d8796f, reversing
changes made to d6cabb09c110fcd3e2d8bf35dc8bc6382dd6b297.
Unmerge greek translation into english
Quick @nickelcityruby plug on en