pyqtgraph: use more up to date revision a6d5e28 on develop branch

conda/pyqtgraph/meta.yaml

@@ -1,11 +1,10 @@
 package:
   name: pyqtgraph
-  version: "0.9.10"
+  version: 0.9.10~a6d5e28
 
 source:
-  fn: pyqtgraph-0.9.10.tar.gz
-  url: https://pypi.python.org/packages/source/p/pyqtgraph/pyqtgraph-0.9.10.tar.gz
-  md5: bd84bf7537c43cf38db81cc1ad4f743a
+  git_url: https://github.com/pyqtgraph/pyqtgraph.git
+  git_rev: a6d5e28
 
 requirements:
   build:

setup.py

@@ -42,6 +42,9 @@ setup(
     license="BSD",
     install_requires=requirements,
     extras_require={},
+    dependency_links=[
+        "git+https://github.com/pyqtgraph/pyqtgraph.git@a6d5e28#egg=pyqtgraph"
+    ],
     packages=find_packages(),
     namespace_packages=[],
     test_suite="artiq.test",