Add experimental backtrace for Queries

See #140
Disabled by default. Detects Twig, not sure how to detect Blade
templates or more specific route bindings/closures.
Remove typehint for 4.3 compat.

In 4.3, the publisher class has been renamed. It isn't actually needed, so just removed it. Fixes #174
Use directory seperator instead of /

For windows
Set min-height for debugbar-body

So it can't be accidentally be dragged down all the way and confused for not working. See #171 and #122
Remove gitattributes
Tweak openhandler

Overwrite files until https://github.com/maximebf/php-debugbar/pull/151
is merged (or similar)
Add color to openhandler links
Inline laravel icon

Remove images from public folder, to make it easier to inline css/js
(later on)
Add session collector.
Inline other icons
Tweak IP width
PSR-4-ify
Bump version
Use controllers instead of callbacks
Remove openhandler icon path
Specify stricter version.
Work on assets.

Use embedded fonts.
Fix resource path
A few cs fixes
Merge pull request #182 from GrahamCampbell/cs

A few cs fixes