Fix streaming video from named pipe

CFile::IoControl(IOCTRL_SEEK_POSSIBLE) should only return true for regular files
When binary video data is streamed from another application using a named pipe, it is not possible to seek,
and data should be read sequentially.
Merge pull request #90 from maxnet/master

Fix for streaming video from another application over a named pipe
Merge pull request #88 from Stasik0/master

Additional custom event handlers
use OMXMediaTime for current PTS stats display (fixes #89)
Merge pull request #93 from turingmachine/fix_pts_display

use OMXMediaTime for current PTS stats display (fixes #89)
Merge remote-tracking branch 'upstream/master'