Add basic cmake build instructions.
Deleted NEWS (no real content).
Rework of the README file.
Some cosmetics.
Signed-off-by: gregory guy <gregory-tde@laposte.net>
(cherry picked from commit a9a88a04a1)
rfc4791.pdf has been moved to the doc folder.
caldav pc file has been moved in the src folder.
Signed-off-by: gregory guy <gregory-tde@laposte.net>
(cherry picked from commit 19b046ec42)