Update .travis.yml

Attempting to use uploadtool to upload appImages from continuous builds to Releases.

.travis.yml

@@ -26,4 +26,10 @@ after_success:
   - ./linuxdeployqt*.AppImage ./appdir/usr/share/applications/*.desktop -appimage
   - find ./appdir -executable -type f -exec ldd {} \; | grep " => /usr" | cut -d " " -f 2-3 | sort | uniq
   - ls -lh ./gLabels*.AppImage
-  - curl --upload-file ./gLabels*.AppImage https://transfer.sh/gLabels-git.$(git rev-parse --short HEAD)-x86_64.AppImage
+  - wget -c https://github.com/probonopd/uploadtool/raw/master/upload.sh
+  - bash ./upload.sh gLabels*.AppImage
+  
+branches:
+  except:
+    - # Do not build tags that we create when we upload to GitHub Releases
+    - /^(?i:continuous)$/