Go API doesn't match with REST API and better documentation is needed

[mango009]

For example, REST API has a GetPoint that get only one single point but Go has only compatible API to get multiple points.

Also, the example does not demonstrate everything that can be done with the go client (success and failure case). it will help if this repo can provide better documentation such as GoDoc or a better ReadMe. To find out the API available (function signature, params and result type), I have to go through the .proto files and cross checking the generated .go files.