Fixed some @params documentation (includes/[Export.php|Import.php])

Swapped some "$var type" to "type $var" or added missing types
before the $var. Changed some other types to match the more common
spelling. Makes beginning of some text in captial.

Change-Id: I32ed752d23088f6203462134b2af57c6f06a4de5
Merge "Fixed some @params documentation (includes/[Export.php|Import.php])"