overlay---baidumap api

this file is base baidu map api.we can use to draw grid on baidu map .
Revert "overlay---baidumap api"

This reverts commit be9f1438630a6aec2e6b0c1e0c95dd2f164d4bef.
Revert "Revert "overlay---baidumap api""

This reverts commit 2bfa6566954e3da6701f9564d62474a8eb90902e.
Revert "Revert ":lollipop: Added .gitattributes & .gitignore files""

This reverts commit e69ba69f16e5cc7a54fbeb7bc6ed7a5f25ff073d.