Up需要更新了

[jessecai-econ]

地理编码和逆地理编码3.0了，需要更新了

[womeimingzi11]

I have upgrade this API from v2.0 to v3.0, once this PR #20 meged, everything will work well. Before that, you can install baidumap from my repo by this:
devtools::install.github('womeimingzi11/baidumap')

[wangxiaolei0721]

devtools::install_github('womeimingzi11/baidumap') is right