add web-interface items to replace annoying SG procedures

[jbrzusto]

The SG is running a web server, so why are we forcing users to jump through ridiculous hoops to do these things:

• [ ] upload a tag database
• [ ] cleanly shut down the SG
• [ ] parse, validate, and upload deployment.txt from either a text window or GUI
• [ ] restart the SG's master process, so that a modified deployment.txt can take effect without a full SG reboot.
• [ ] set up networking parameters (internal Hot Spot, tethering, access to external WiFi, cell modem)
• [ ] download all data recorded since previous download (or all data ever recorded)
• [ ] record receiver deployment information for transfer to motus