Add repo info command

The info command will print information regarding the current manifest
and local git branch. It will also show the difference of commits
between the local branch and the remote branch.

It also incorporates an overview command into info which shows commits
over all branches.

Change-Id: Iafedd978f44c84d240c010897eff58bbfbd7de71
diff --git a/subcmds/overview.py b/subcmds/overview.py
index 9e6100b..418459a 100644
--- a/subcmds/overview.py
+++ b/subcmds/overview.py
@@ -55,8 +55,11 @@
       def __init__(self, config):
         Coloring.__init__(self, config, 'status')
         self.project = self.printer('header', attr='bold')
+        self.text = self.printer('text')
 
     out = Report(all_branches[0].project.config)
+    out.text("Deprecated. See repo info -o.")
+    out.nl()
     out.project('Projects Overview')
     out.nl()