Revert "Remove dotnet-build scripts"

This reverts commit 9992e48c60.

build/buildpipeline/linux.groovy

@@ -0,0 +1,11 @@
+@Library('dotnet-ci') _
+
+simpleNode('Ubuntu16.04', 'latest-or-auto-docker') {
+    stage ('Checking out source') {
+        checkout scm
+    }
+    stage ('Build') {
+        def environment = 'export SIGNALR_TESTS_VERBOSE=1'
+        sh "${environment} && ./build.sh --ci"
+    }
+}

build/buildpipeline/osx.groovy

@@ -0,0 +1,11 @@
+@Library('dotnet-ci') _
+
+simpleNode('OSX10.12','latest') {
+    stage ('Checking out source') {
+        checkout scm
+    }
+    stage ('Build') {
+        def environment = 'export SIGNALR_TESTS_VERBOSE=1'
+        sh "${environment} && ./build.sh --ci"
+    }
+}

build/buildpipeline/pipeline.groovy

@@ -0,0 +1,18 @@
+import org.dotnet.ci.pipelines.Pipeline
+
+def windowsPipeline = Pipeline.createPipeline(this, 'build/buildpipeline/windows.groovy')
+def linuxPipeline = Pipeline.createPipeline(this, 'build/buildpipeline/linux.groovy')
+def osxPipeline = Pipeline.createPipeline(this, 'build/buildpipeline/osx.groovy')
+String configuration = 'Release'
+def parameters = [
+    'Configuration': configuration
+]
+
+windowsPipeline.triggerPipelineOnEveryGithubPR("Windows ${configuration} x64 Build", parameters)
+windowsPipeline.triggerPipelineOnGithubPush(parameters)
+
+linuxPipeline.triggerPipelineOnEveryGithubPR("Ubuntu 16.04 ${configuration} Build", parameters)
+linuxPipeline.triggerPipelineOnGithubPush(parameters)
+
+osxPipeline.triggerPipelineOnEveryGithubPR("OSX 10.12 ${configuration} Build", parameters)
+osxPipeline.triggerPipelineOnGithubPush(parameters)

build/buildpipeline/windows.groovy

@@ -0,0 +1,12 @@
+@Library('dotnet-ci') _
+
+// 'node' indicates to Jenkins that the enclosed block runs on a node that matches
+// the label 'windows-with-vs'
+simpleNode('Windows_NT','latest') {
+    stage ('Checking out source') {
+        checkout scm
+    }
+    stage ('Build') {
+        bat '.\\run.cmd -CI default-build'
+    }
+}