* merged .travis.yml from master

Add a pagination example, see #521

Fix: Remove unused imports

Fix: Cache dependencies installed with composer between builds

Fix: Remove useless override

Fix: Use more appropriate assertion

Fix: Remove useless return statements

Fix: Move assignment of default values before condition

Fix: Inline variable

Enhancement: Configure phpunit to use color

Fix: Case mismatch

Fix: Remove unused parameters

Fix: Use trusty dist

chore(travis): run travis on PHP 7.1

fix(client): set the connection timeout as the timeout (like Guzzlev3)

fix(client): set the connection_timeout for Guzzle v3

Check ini_get is not disabled before using it

Basing off pull request 413, fixing tests