RTCMultiConnection-v2.1.4 added with many fixes & updates.

-. Screen negotiations fixed. Screen can be renegotiated many times.

-. preferJSON is removed. Now data is "always" sent as ArrayBuffer.

-. connection.candidates has been fixed.

-. FileSender/FileReceiver/FileConveter has been removed.

-. FileBufferReader added. https://github.com/muaz-khan/FileBufferReader

-. onFileStart/onFileProgress/onFileEnd: now having "userid" and "extra"
objects.