[4.2] Gey keyName before instance can be translated into builder
[4.2] Always operate with query builder to prevent possible bugs
Fix broken MorphTo related test (testModelsAreProperlyPulledAndMatched)
Adding `$table->rememberToken()` method to schema builder

Includes tests

Signed-off-by: Adam Engebretson <adam@enge.me>
Adding `$table->rememberToken()` DocBlocks

Signed-off-by: Adam Engebretson <adam@enge.me>
Load environment variables array in dot-flatten form
improve formatting of mail logging
Garbage collector not delete old sessions
Call Artisan dump-autoload after session:table
[4.2] Add flip to Collection
Intend $app->booted closure code
Add use ...\Str to helpers.php
Change code alignment for str_limit function
Let keys() function returns the keys of the Collection items
Allows Datetime as duration argument for TaggedCache
Add tests
migrate:refresh command now properly passed force option to reset and migrate
Fix optimize command and view resolver for unknown extensions. Fixes #4688
Merge pull request #4687 from RyanNielson/cascade_force_option_in_migrate_refresh

migrate:refresh command now properly passes force option to reset and migrate
Fix spacing.