[Feature] 解决 线条 label billboard加载太多，球卡的问题
[Feature]增加新接口函数
Merge branch 'dev1' of https://github.com/liuzhic/hrv into liuzhic-dev1

Conflicts:
	static/js/cesium.js
	static/js/cesium/intro.js
Merge branch 'liuzhic-dev1'
Merge branch 'master' of https://github.com/hrvdev/hrv