Added a .travis.yml to build the SDK on travis

.travis.yml

@@ -0,0 +1,59 @@
+language: java
+sudo: false
+env:
+ - GRADLE_USER_HOME=gradle-cache
+ 
+cache:
+  directories:
+   - gradle-cache
+   - netbeans
+
+# branches:
+#   only:
+#   - master
+
+notifications:
+  slack:
+    on_success: change
+    on_failure: always
+    rooms:
+      secure: "PWEk4+VL986c3gAjWp12nqyifvxCjBqKoESG9d7zWh1uiTLadTHhZJRMdsye36FCpz/c/Jt7zCRO/5y7FaubQptnRrkrRfjp5f99MJRzQVXnUAM+y385qVkXKRKd/PLpM7XPm4AvjvxHCyvzX2wamRvul/TekaXKB9Ti5FCN87s="
+
+install:
+  -  ./gradlew buildSdk
+
+#script:
+#  - ./gradlew check
+#  - ./gradlew createZipDistribution
+
+#before_deploy:
+#  - export RELEASE_DIST=$(ls build/distributions/*.zip)
+
+#deploy:
+#  provider: releases
+#  api_key:
+#    secure: PuEsJd6juXBH29ByITW3ntSAyrwWs0IeFvXJ5Y2YlhojhSMtTwkoWeB6YmDJWP4fhzbajk4TQ1HlOX2IxJXSW/8ShOEIUlGXz9fHiST0dkSM+iRAUgC5enCLW5ITPTiem7eY9ZhS9miIam7ngce9jHNMh75PTzZrEJtezoALT9w=
+#  file_glob: true
+#  file: "${RELEASE_DIST}"
+#  skip_cleanup: true
+#  on:
+#    repo: jMonkeyEngine/jmonkeyengine
+#    tags: true
+
+before_install:
+  - git fetch --unshallow
+  - "[ $TRAVIS_PULL_REQUEST == 'false' ] && openssl aes-256-cbc -K $encrypted_a1949b55824a_key -iv $encrypted_a1949b55824a_iv -in private/www-updater.key.enc -out private/www-updater.key -d || :"
+
+# before_install:
+  # required libs for android build tools
+  # sudo apt-get update
+  # sudo apt-get install -qq p7zip-full
+  # sudo apt-get install -qq --force-yes libgd2-xpm ia32-libs ia32-libs-multiarch
+  # newest Android NDK
+  # wget http://dl.google.com/android/ndk/android-ndk-r10c-linux-x86_64.bin -O ndk.bin
+  # 7z x ndk.bin -y > /dev/null
+  # export ANDROID_NDK=`pwd`/android-ndk-r10c
+
+#after_success:
+#  - '[ "$TRAVIS_BRANCH" == "master" ] && [ "$TRAVIS_PULL_REQUEST" == "false" ] && ./gradlew uploadArchives || :'
+#  - '[ -n "$TRAVIS_TAG" ] && [ "$TRAVIS_PULL_REQUEST" == "false" ] && ./gradlew uploadArchives bintrayUpload || :'