Updated dependencies
Use prepared statements
Made search queries non-mysql specific
Of course I forgot one. And some small refactoring.
More query refactorings
Updated composer.json to match master and updated lock file
Merge remote-tracking branch 'upstream/master' into issue-203-full-query-refactoring

Conflicts:
	app/src/Bolt/Storage.php
Merge pull request #259 from pvankouteren/issue-203-full-query-refactoring

Issue 203 full query refactoring