add gismanager (#2204)
add gismanager (#2204)

Publish Your GIS Data(Vector Data) to PostGIS and Geoserver

**Please provide package links to:**

- github.com repo:https://github.com/hishamkaram/gismanager
- godoc.org: https://godoc.org/github.com/hishamkaram/gismanager
- goreportcard.com: https://goreportcard.com/report/github.com/hishamkaram/gismanager
- coverage service link: [![Coverage Status](https://coveralls.io/repos/github/hishamkaram/gismanager/badge.svg?branch=master&service=github)](https://coveralls.io/github/hishamkaram/gismanager?branch=master&service=github)


Very good coverage

**Note**: that new categories can be added only when there are 3 packages or more.

**Make sure that you've checked the boxes below before you submit PR:**
- [X] I have added my package in alphabetical order.
- [X] I have an appropriate description with correct grammar.
- [X] I know that this package was not listed before.
- [X] I have added godoc link to the repo and to my pull request.
- [X] I have added coverage service link to the repo and to my pull request.
- [X] I have added goreportcard link to the repo and to my pull request.
- [X] I have read [Contribution guidelines](https://github.com/avelino/awesome-go/blob/master/CONTRIBUTING.md#contribution-guidelines), [maintainers note](https://github.com/avelino/awesome-go/blob/master/CONTRIBUTING.md#maintainers) and [Quality standard](https://github.com/avelino/awesome-go/blob/master/CONTRIBUTING.md#quality-standard).

Thanks for your PR, you're awesome! :+1:

jmelfi/awesome-go,sadlil/awesome-go,Oire/awesome-go,theckman/awesome-go,pconcepcion/awesome-go,avelino/awesome-go