Update documentation

- Add mongodb and pymongo to installation section
- Update REST interface definition of candidate
Change port 20080 to 10080

- Change port 20080 to 10080
Update documentation such that all client/server communication data JSON array of JSON objects

- Update documentation such that all client/server communication data JSON array of JSON objects
- Add "data reception" and "location candidate" event schema
Change candidates to candidate

- Change candidates to candidate
Merge pull request #3 from SoftwareDefinedBuildings/feature-doc

Merge Docs to Develop

- Merge Docs to Develop