Admin edit stations

[jdg006]

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Description

admins can edit stations. If a station has an address and a coordinate pair is added then the address is deleted and if a station has a coordinate pair and an address is added then the coordinate pair is deleted

Fixes #143

Developer Checklist

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• [x] I have read and followed the contribution guidelines.
• [ ] All specs and linters pass (including Code Climate)
• [x] I have followed the style of nearby code
• [x] The build on Semaphore is successful
• [x] I have added tests for my changes.
• [x] I have gone through my changes by hand, either in the browser or terminal, which ever makes sense
• [x] I have internationalized my changes

[crawfoal]

Thank you for taking the time to work on this. Unfortunately I cannot accept this because it doesn't follow the contribution guidelines or issue template. There are various Code Climate issues and the admins station controller doesn't follow the style of the existing code - it has too many responsibilities. I think it will be best to start from scratch on this issue, so I am closing this.