Updated services managers to use static scalar class names

Signed-off-by: Grégory PLANCHAT <g.planchat@gmail.com>
Updated Libuv adapter callback calls

Signed-off-by: Grégory PLANCHAT <g.planchat@gmail.com>
Removed Net\Protocol\Dns namespace

Signed-off-by: Grégory PLANCHAT <g.planchat@gmail.com>
Updated services managers to use static scalar class names

Signed-off-by: Grégory PLANCHAT <g.planchat@gmail.com>
Merge branch 'master' of github.com:gplanchat/php-io

Conflicts:
	src/Gplanchat/Io/Net/Protocol/Dns/DefaultRequestHandler.php