Build on Travis using PowerShell build module

.travis.yml

@@ -14,9 +14,10 @@ before_install:
   - sudo apt-key adv --keyserver apt-mo.trafficmanager.net --recv-keys 417A0893
   - sudo apt-get -qq update
   - sudo apt-get install -y dotnet=1.0.0.001675-1
+  - ./download.sh
+  - sudo dpkg -i powershell.deb
 script:
-  - dotnet restore
-  - ./build.sh
+  - powershell -c "Import-Module ./PowerShellGitHubDev.psm1; Start-PSBuild"
   - ./pester.sh
 notifications:
   slack: