Merge pull request #80 from wangnuannuan/feature/travis_ci

travis: modify python code and config file .travis.yml

Author: Wayne Ren

.ci/before_install.sh

@@ -26,8 +26,8 @@ fi
         pip install recommonmark || die
         pip install sphinx_rtd_theme || die   
     }
-    pip install PrettyTable || die
-    pip install colorama || die
+    pip install embarc_cli || die
     pip install configparser || die
     pip install requests || die
+    pip install XlsxWriter || die
 }