Floating lidar file format

[stephenholleran]

This is a pull request to facilitate the conversation #268 and implementation on the possible new floating lidar file format that is delivered to consumers of the timeseries data.

[stephenholleran]

@kersting as promised what I have got done so far. I plan on working on it again in the morning so no point doing any detailed review. At a high level you can comment on the new folder and if the files within the folder are appropriate.

There are (so far) 4 new files.

1. The README is the big one which contains an outline of the project and details of the file format. I am just putting thoughts down in no real order with loads of mistakes. I plan on putting in more content and clean it up a bit tomorrow.
2. A sample file floating_lidar_file_format.csv which has a valid header but only a few column names. More examples of column names are needed which may increase the header content. Suggestions of column names would be useful if you have any?
3. A JSON Schema, floating_lidar_file_format_header_schema.json, which validates the header. This is basically the WRA Data Model with a lot of parts not needed deleted. This is final and can be reviewed in detail.
4. A change log file which follows the same format as the WRA Data Model. Since this is the first release there are no changes to document.

Cheers,

[stephenholleran]

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