csharp travis integration

.travis.yml

@@ -8,6 +8,7 @@ script:
 env:
   - CONFIG=cpp
   - CONFIG=cpp_distcheck
+  - CONFIG=csharp
   - CONFIG=java_jdk6
   - CONFIG=java_jdk7
   - CONFIG=java_oracle7

travis.sh

@@ -14,6 +14,19 @@ build_cpp_distcheck() {
   make distcheck -j2
 }
 
+build_csharp() {
+  # Install latest version of Mono
+  sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
+  echo "deb http://download.mono-project.com/repo/debian wheezy main" | sudo tee /etc/apt/sources.list.d/mono-xamarin.list
+  echo "deb http://download.mono-project.com/repo/debian wheezy-libtiff-compat main" | sudo tee -a /etc/apt/sources.list.d/mono-xamarin.list
+  sudo apt-get update -qq
+  sudo apt-get install -qq mono-devel referenceassemblies-pcl nunit
+  wget www.nuget.org/NuGet.exe -O nuget.exe
+
+  (cd csharp/src; mono ../../nuget.exe restore)
+  csharp/buildall.sh
+}
+
 use_java() {
   if [ `uname` != "Linux" ]; then
     # It's nontrivial to programmatically install a new JDK from the command
@@ -135,6 +148,7 @@ build_jruby() {
 if [ "$#" -ne 1 ]; then
   echo "
 Usage: $0 { cpp |
+            csharp |
             java_jdk6 |
             java_jdk7 |
             java_oracle7 |