updatet Testcase for Config Repository to show that Config::has fails on a true value because it weakly compares the values

updated Config Repository to strong compare the values which will lead to the correct result
Fix arraying of relations.
changed intends
Fix prefix issue on Memcached.
Merge pull request #2069 from Chumper/4.0

Config Repository fails on a true value due to weak comparison
Added contribution guidelines.
Refactored tests for limit and offset.
Added limit() and offset() with aliases.
Merge pull request #2083 from daylerees/skip-take-aliases

Added limit() and offset() to Query Builder.
Fixed inverse logic error

Updating the model when it already exists and create a new one if it doesn't.
Merge pull request #2100 from peaceman/4.0

Inverse logic error in the model update method
Reverting change.
Added __callStatic to database capsule to dynamically pass methods to Connection
Merge pull request #2101 from jchamberlain/4.0

Added __callStatic to database capsule
Document new __callStatic() in Database Capsule
Merge pull request #2102 from jchamberlain/4.0

Document new __callStatic() in Database Capsule
Check for driver based extension.
Add ability to append items to model arrays / JSON.
Update change log.
Fixing DocBlock for Model.php

Fixing a small typo and adding `@var array` to DocBlock for new appends functionality.