devflow: Bump version to 2.1rc2
Do not exit on failed info request
Fix compilation error due to incorrect value

Make get_image_info() return EIO on fail.
Wait for xseg I/O handler initialization to complete
Remove useless type casting
Destroy thread attributes object
Free unused memory allocations on close
Merge branch 'release-2.1' into debian-release-2.1
Bump version to 2.1~rc2-1~wheezy

Signed-off-by: Filippos Giannakos <philipgian@grnet.gr>