fix release publishing (#38)

* separate release and debug configs

.appveyor.yml

@@ -10,9 +10,7 @@ environment:
 install:
   - java -version
 
-configuration:
-  - debug
-  - release
+configuration: debug
 
 build_script:
   - ant -buildfile ./src/build/build.xml $CONFIGURATION
@@ -40,23 +38,23 @@ deploy:
     auth_token: $GITHUB_TOKEN
     on:
       branch: master
-      configuration: release
+      CONFIGURATION: release
   - provider: GitHub
     tag: v${VERSION}
     release: Zcash Desktop GUI Wallet ${VERSION}
     artifact: installer/target/zcash-wallet-installer.exe
     auth_token: $GITHUB_TOKEN
     on:
       branch: master
-      configuration: release
+      CONFIGURATION: release
   - provider: GitHub
     tag: v${VERSION}
     release: Zcash Desktop GUI Wallet ${VERSION}
     artifact: /build\/ubuntu-package\/.*\.deb/
     auth_token: $GITHUB_TOKEN
     on:
       branch: master
-      configuration: release
+      CONFIGURATION: release
 
 for:
 -
@@ -67,3 +65,10 @@ for:
   deploy_script:
     - gem install package_cloud
     - package_cloud push blbradley/zcash-wallet-dev/ubuntu/xenial build/ubuntu-package/*.deb
+
+-
+  branches:
+    only:
+      - master
+
+  configuration: release