revert to haxe 3.1.3

.travis.yml

@@ -5,7 +5,7 @@ env:
   global:
     #- OS=mac # add this too to let the script know that the OS is a mac
     # - ARCH=i686 # add this to run in 32-bit mode. See availability at README
-    - HAXE_VER: latest
+    - HAXE_VER: 3.1.3
       # SAUCE_ACCESS_KEY
     - secure: "YOUR_ENCRYPTED_SAUCE_ACCESS_KEY" # if you want to use SauceLabs
       # SAUCE_USERNAME
@@ -36,7 +36,7 @@ env:
       # optional: FILENAME
 #    - TARGET=swf8
       # optional: FILENAME
-    - TARGET=python
+    #- TARGET=python
       # optional: FILENAME
       # optional: PYTHONCMD