Remove user agent class support

[mworrell]

Fixes #1347

This removes the ua_classifier and support for user-agent specific templates.

To do:

• Documentation
• Testing

[mworrell]

@arjan @ddeboer ready to be merged, can you test drive it?

[mmzeeman]

BTW: This looks like a nice erlang application which does user agent identification.

https://github.com/SiftLogic/uaparser

It recognizes the recent safari as:

[{browser,[{name,<<"safari">>},{family,<<"safari">>},{manufacturer,<<"apple">>},{type,<<"web_browser">>},{renderer,<<"webkit">>},{version,<<"9.1.1">>},{version_details,[{major,9},{minor,1},{patch,1}]}]},
 {os,[{name,<<"mac os x">>},{family,<<"mac_os_x">>},{manufacturer,<<"apple">>},{type,<<"computer">>},{version,<<"10_11_5">>},{version_details,[{major,10},{minor,11},{patch,5}]}]}]

[ddeboer]

@mmzeeman The current idea is just to throw out User Agent identification, as it can and should be solved on the CSS instead (media queries and the like). Do you have a user case for User Agent identification in Erlang?

@mworrell Will try to find some time for testing.

[mmzeeman]

@ddeboer Indeed, for template selection browser classification is not needed anymore. But for informational purposes it is sometimes needed to have browser identification. Think about support forms, statistics, ugly hacks (sometimes needed). My current use case is to make an informational page of all logged in users of an account to a supervisor. This page needs some browser information, like "Safari on iPod", "Firefox on windows 8".

[mworrell]

Checked with @ArthurClemens, going to merge this.

[ddeboer]

@mworrell Thanks!