Merge pull request jwiegley#33 from Mezzle/git-link-upstream

Add script to link to upstream branch

Author: jwiegley

git-current-branch

@@ -0,0 +1,2 @@
+#!/bin/bash
+git rev-parse --abbrev-ref HEAD

git-link-upstream

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+BRANCH=$(git-current-branch)
+
+git branch --set-upstream-to=origin/$BRANCH $BRANCH