Add travis (#10)

.travis.yml

+language: c
+compiler: gcc
+dist: xenial
+notifications:
+  email: false
+
+before_install:
+    - git submodule init
+    - git submodule update --recursive
+
+script:
+    - mkdir build
+    - cd build 
+    - cmake -DBUILD_DAP_STREAM_TESTS=ON ../
+    - make
+    - ctest --verbose
+
+addons:
+  apt:
+    sources:
+    - ubuntu-toolchain-r-test
+    packages:
+    - libjson-c-dev
+    - libev-dev
+    - libmagic-dev

CMakeLists.txt

 project(libdap-stream C)
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 
 if(NOT (${SUBMODULES_NO_BUILD} MATCHES ON))
     set(SUBMODULES_NO_BUILD ON)
@@ -10,10 +10,10 @@ if(NOT (${SUBMODULES_NO_BUILD} MATCHES ON))
     add_subdirectory(libdap-stream-ch)
 endif()
 
-#if(BUILD_DAP_STREAM_TESTS)
+if(BUILD_DAP_STREAM_TESTS)
     enable_testing()
     add_subdirectory(test)
-#endif()
+endif()
 
 add_subdirectory(session)
 add_subdirectory(stream)