Range finder setup for AC3.2 (and plane)

The way that sonar is set-up on ArduCopter will change greatly in AC3.2 as we're consolidating with plane.

Here are all the setup wiki pages but I'll try and come up with a better mock-up of what it could look like. I suspect there will be some drop-downs and we may need to add some more parameter descriptions.

http://copter.ardupilot.com/wiki/common-rangefinder-landingpage/
http://copter.ardupilot.com/wiki/common-rangefinder-maxbotix-analog/
http://copter.ardupilot.com/wiki/common-rangefinder-maxbotixi2c/
http://copter.ardupilot.com/wiki/common-rangefinder-lidarlite/
http://copter.ardupilot.com/wiki/common-rangefinder-sf02/

Start by reviewing the linked common rangefinder landing page and the MaxBotix analog, MaxBotix I2C, LidarLite, and SF02 setup pages. Clarify the AC3.2 consolidation with Plane and define the proposed mock-up, dropdowns, and any missing parameter descriptions. Done means the setup documentation has an agreed structure and the affected pages are updated consistently.

Written by the indexing model from the issue text.