Extend Controller when possible

Merge pull request barryvdh#360 from JerseyMilker/make-session-default

Default enable session collector.

Rename LaravelDebugBar.php to LaravelDebugbar.php

Fixes barryvdh#303 caused by barryvdh#302

Detect app.debug if enabled is null

Fixes barryvdh#285
It cannot be guaranteed that app.debug is loaded before debugbar.

Swap register/boot order

Remove L5 support from 1.x

Move publishes to boot

Update Font Awesome to 4.3.0

Fixes barryvdh#264

Remove cast toArray

See barryvdh#248

remove 5.4 syntax

Fixes barryvdh#240