* master: (806 commits)
avoid confusing docs about autoload return value
doc fix.
Fixed doc.
Fixed autoloader behavior according to leading \
Fix in RequestPanel
changed to trace from info.
Removed yii\debug\Module::enabled.
minor enhancement of debugger.
Refactored the basic app.
Added ErrorAction.
Use `hasAttribute()` instead to avoid code duplication
refactored NavBar and basic app navbar.
test break fix.
test break fix.
Fixed test breaks.
#735: removed hiddenInput to avoid confusion.
ResizableAsset typo fix!
Update radio and checkbox due to e3801fbf6b
css fix.
Fixed the basic app template.
...
Conflicts:
.travis.yml
tests/unit/data/config.php
