Add JSdraw to INSTALLED_APPS if we can.

cms/envs/common.py

@@ -525,3 +525,13 @@ YOUTUBE_API = {
 ##### ACCOUNT LOCKOUT DEFAULT PARAMETERS #####
 MAX_FAILED_LOGIN_ATTEMPTS_ALLOWED = 5
 MAX_FAILED_LOGIN_ATTEMPTS_LOCKOUT_PERIOD_SECS = 15 * 60
+
+
+### JSdraw (only installed in some instances)
+
+try:
+    import edx_jsdraw
+except ImportError:
+    pass
+else:
+    INSTALLED_APPS += ('edx_jsdraw',)

lms/envs/common.py

@@ -1487,3 +1487,13 @@ ALL_LANGUAGES = (
     [u"za", u"Zhuang; Chuang"],
     [u"zu", u"Zulu"]
 )
+
+
+### JSdraw (only installed in some instances)
+
+try:
+    import edx_jsdraw
+except ImportError:
+    pass
+else:
+    INSTALLED_APPS += ('edx_jsdraw',)