Hard code edx_sga to ADVANCED_COMPONENT_TYPES and

add entry to github.txt.
    Quick fix while waiting for the upstream PR to come through.

cms/djangoapps/contentstore/views/component.py

@@ -65,7 +65,8 @@ else:
         'concept',  # Concept mapper. See https://github.com/pmitros/ConceptXBlock
         'done',  # Lets students mark things as done. See https://github.com/pmitros/DoneXBlock
         'audio',  # Embed an audio file. See https://github.com/pmitros/AudioXBlock
-        'split_test'
+        'split_test',
+        'edx_sga'
     ] + OPEN_ENDED_COMPONENT_TYPES + NOTE_COMPONENT_TYPES
 
 ADVANCED_COMPONENT_CATEGORY = 'advanced'

requirements/edx/github.txt

@@ -31,3 +31,6 @@
 -e git+https://github.com/edx/opaque-keys.git@5929789900b3d0a354ce7274bde74edfd0430f03#egg=opaque-keys
 -e git+https://github.com/edx/ease.git@f9f47fb6b5c7c8b6c3360efa72eb56561e1a03b0#egg=ease
 -e git+https://github.com/edx/i18n-tools.git@f5303e82dff368c7595884d9325aeea1d802da25#egg=i18n-tools
+
+# Third Party XBlocks
+-e git+https://github.com/mitodl/edx-sga@7e308cf676b6f41493d9cf7864296bc1c089b36b#egg=edx-sga