Add Python 2 build. Remove obsolete VERSION file.

VERSION

-1.7.0

conda/camera/conda_build_config.yaml

@@ -5,6 +5,7 @@ c_compiler:
 cxx_compiler:
   - vs2017                     # [win]
 python:
+  - 2.7                        # [linux]
   - 3.6
 # This differs from target_platform in that it determines what subdir the compiler
 #    will target, not what subdir the compiler package will be itself.