Clean up cmake script and code includes (#106)

* Clean up CMake scripts and related include paths.
* Add unittests.

scripts/travis_script.sh

@@ -24,9 +24,12 @@ fi
 if [ ${TASK} == "cmake-test" ]; then
     mkdir build
     cd build
-    cmake -DRABIT_BUILD_TESTS=ON -DRABIT_BUILD_DMLC=ON ..
+    cmake -DRABIT_BUILD_TESTS=ON -DRABIT_BUILD_DMLC=ON -DGTEST_ROOT=${HOME}/.local ..
+    #unit tests
+    make
+    make test
     make install || exit -1
     cd ../test
     ../scripts/travis_runtest.sh || exit -1
     rm -rf ../build
-fi
+fi

scripts/travis_setup.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+echo "Testing on: ${TRAVIS_OS_NAME}, Home directory: ${HOME}"
+
+pip3 install cpplint pylint urllib3 numpy cpplint
+pip3 install websocket-client kubernetes
+
+
+# Install googletest under home directory
+GTEST_VERSION=1.8.1
+GTEST_RELEASE=release-${GTEST_VERSION}.tar.gz
+GTEST_TAR_BALL=googletest_${GTEST_RELEASE}
+
+wget https://github.com/google/googletest/archive/${GTEST_RELEASE} -O ${GTEST_TAR_BALL}
+echo "152b849610d91a9dfa1401293f43230c2e0c33f8 ${GTEST_TAR_BALL}" | sha1sum -c
+tar -xf ${GTEST_TAR_BALL}
+pushd .
+
+cd googletest-release-${GTEST_VERSION}
+mkdir build
+cd build
+echo "Installing to ${HOME}/.local"
+cmake .. -DBUILD_SHARED_LIBS=ON -DCMAKE_INSTALL_PREFIX=${HOME}/.local
+make -j$(nproc)
+make install
+
+popd
+
+if [ ${TRAVIS_OS_NAME} == "linux" ]; then
+    sudo apt-get install python3-pip tree
+fi
+
+if [ ${TRAVIS_OS_NAME} == "osx" ]; then
+    brew install python3
+fi