add context

Former-commit-id: 8c102027c1

scripts/context.py

@@ -0,0 +1,8 @@
+import os
+
+# Define third party libs location
+scripts_path = os.path.abspath(os.path.dirname(__file__))
+superbuild_path = os.path.join(scripts_path[:-7], 'SuperBuild/')
+
+pyopencv_path = os.path.join(superbuild_path, 'lib/python2.7/dist-packages')
+opensfm_path = os.path.join(superbuild_path, "src/opensfm")