package/libical: bump version to v1.0.1 and switch to cmake

Project moved to github according to http://sourceforge.net/projects/freeassociation

"As of 2014-06-14, this project may now be found at http://github.com/libical.

"

[Thomas: propagate the C++ dependency to bluez5_utils OBEX support,
which selects libical.]

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>