functions. sys_create() now returns an fd of the open file (some code in the
kernel shell already depend on this).
Moved the seek functions to fd.c.
Updated all internal file systems to a new and updated API.
vfs.c is not cleaned up well, but also has some bug fixes.
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@208 a95241bf-73f2-0310-859d-f6bbb57e9c96