IOLoop destructor: added DVVERIFY check that loop has been closed
Class Endpoint - make function names according to codestyle
DF-5198 added libuv.a library for android and changed Android.mk
DF-5198 added SampleEchoServer and multicast support for UDP sockets
DF-5198 refactoring of classes, adding class DeadlineTimer and friends
DF-5198 remove SampleEchoServer from network library
DF-5198 fix some typos