Add support of receive buffer limit & send buffer limit

Update README.md

Some improvement of ws client chronoxor#131

Refactoring of FileCache for HTTP server. FileSystemWatcher is used t…

…o monitor file system changes in cached directories.

Refactoring of FileCache for HTTP server. FileSystemWatcher is used t…

…o monitor file system changes in cached directories.

TcpServer call OnConnected after object disposed chronoxor#115

MakeErrorResponse() method refactoring

TcpServer call OnConnected after object disposed chronoxor#115

Update IsSocketDisposed flag

Merge changes