添加gson工具。完成网络请求框架。并且添加请求注释。

Signed-off-by: jie.qin <1291581156@qq.com>
Merge branch 'master' of
git@github.com:qinjie-545/PreschoolEducation.git

Conflicts:
	3_工程代码/PreSchoolEducation/.classpath
	3_工程代码/PreSchoolEducation/src/com/greenbamboo/prescholleducation/PreSchoolEducationApplication.java