Fix compile on some systems, eg Debian Wheezy.

See for example http://www.khronos.org/message_boards/showthread.php/7931-quot-*-has-not-been-declared-quot-when-including-cl-hpp#p15047
Add a new directory which will hold OpenCL wrapper classes.
Merge branch 'hdevalence-gsoc2013' of git://anongit.kde.org/kstars into hdevalence-gsoc2013