Move common variables to global section

appveyor.yml

@@ -4,6 +4,7 @@ environment:
     # /E:ON and /V:ON options are not enabled in the batch script intepreter
     # See: http://stackoverflow.com/a/13751649/163740
     CMD_IN_ENV: "cmd /E:ON /V:ON /C .\\appveyor\\run_with_env.cmd"
+    JANSSON_VERSION: "2.10"
 
   matrix:
 
@@ -15,13 +16,11 @@ environment:
     - PYTHON: "C:\\Python266"
       PYTHON_VERSION: "2.6.6"
       PYTHON_ARCH: "32"
-      JANSSON_VERSION: "2.10"
       VS: "Visual Studio 9 2008"
 
     - PYTHON: "C:\\Python266-x64"
       PYTHON_VERSION: "2.6.6"
       PYTHON_ARCH: "64"
-      JANSSON_VERSION: "2.10"
       VS: "Visual Studio 9 2008 Win64"
 
     # Pre-installed Python versions, which Appveyor may upgrade to
@@ -31,49 +30,41 @@ environment:
     - PYTHON: "C:\\Python27"
       PYTHON_VERSION: "2.7.x" # currently 2.7.13
       PYTHON_ARCH: "32"
-      JANSSON_VERSION: "2.10"
       VS: "Visual Studio 9 2008"
 
     - PYTHON: "C:\\Python27-x64"
       PYTHON_VERSION: "2.7.x" # currently 2.7.13
       PYTHON_ARCH: "64"
-      JANSSON_VERSION: "2.10"
       VS: "Visual Studio 9 2008 Win64"
 
     - PYTHON: "C:\\Python33"
       PYTHON_VERSION: "3.3.x" # currently 3.3.5
       PYTHON_ARCH: "32"
-      JANSSON_VERSION: "2.10"
       VS: "Visual Studio 10 2010"
 
     - PYTHON: "C:\\Python33-x64"
       PYTHON_VERSION: "3.3.x" # currently 3.3.5
       PYTHON_ARCH: "64"
-      JANSSON_VERSION: "2.10"
       VS: "Visual Studio 10 2010 Win64"
 
     - PYTHON: "C:\\Python34"
       PYTHON_VERSION: "3.4.x" # currently 3.4.4
       PYTHON_ARCH: "32"
-      JANSSON_VERSION: "2.10"
       VS: "Visual Studio 10 2010"
 
     - PYTHON: "C:\\Python34-x64"
       PYTHON_VERSION: "3.4.x" # currently 3.4.4
       PYTHON_ARCH: "64"
-      JANSSON_VERSION: "2.10"
       VS: "Visual Studio 10 2010 Win64"
 
     - PYTHON: "C:\\Python35"
       PYTHON_VERSION: "3.5.x" # currently 3.5.3
       PYTHON_ARCH: "32"
-      JANSSON_VERSION: "2.10"
       VS: "Visual Studio 14 2015"
 
     - PYTHON: "C:\\Python35-x64"
       PYTHON_VERSION: "3.5.x" # currently 3.5.3
       PYTHON_ARCH: "64"
-      JANSSON_VERSION: "2.10"
       VS: "Visual Studio 14 2015 Win64"
 
 install: