Clean up \OC\Util

 - Use camelCase

 - Add some phpdoc

 - Fix some indents

 - Use some more spacing
Fix some naming and spacing in lib/util.php
Merge branch 'master' into clean_up_util

Conflicts:
	lib/util.php
fixing typos
Fix some phpdoc and camelcase
Merge branch 'master' into clean_up_util

Conflicts:
	lib/base.php
Merge pull request #4449 from owncloud/clean_up_util

Clean up \OC\Util