Update CI config

.travis.yml

 language: csharp
 sudo: required
-dist: trusty
 mono: none
-dotnet: 1.0.0
+
+matrix:
+  include:
+  - os: linux
+    dist: trusty # Ubuntu 14.04
+    dotnet: 1.0.1
+    mono: none
+    env: DOTNETCORE=1
+    sudo: required
+  - os: osx
+    osx_image: xcode7.3 # macOS 10.11
+    dotnet: 1.0.1
+    mono: none
+    env: DOTNETCORE=1
+
+before_install:
+  - chmod a+x ./build.sh
+  - if [ "$TRAVIS_OS_NAME" == "osx" ]; then ulimit -n 1024 ; fi
 
 install:
   - export DOTNET_CLI_TELEMETRY_OPTOUT=1
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then rvm get stable; brew update; brew install openssl; fi
-os:
-  - linux
-  - osx
-osx_image: xcode7.3
-before_script:
-  - chmod a+x ./build.sh
+
 script:
-  - ./build.sh
-notifications:
+  - ./build.sh
\ No newline at end of file
-  email: false