TCP and UDP chat

What's Changed

Connection: Add HELLO message by @Szaroslav in #21
Create run.sh script by @Szaroslav in #22
Run: Fix by @Szaroslav in #23
Run: Move connection.c to common dependencies by @Szaroslav in #24
File descriptor: Remove GNU_SOURCE macro by @Szaroslav in #25
Socket: Distinction between TCP and UDP, extend module of UDP functions by @Szaroslav in #26
Connection: Distinction between TCP and UDP by @Szaroslav in #27
Byte: Initialization by @Szaroslav in #28
Byte: Add ubyte by @Szaroslav in #29
Byte: Update by @Szaroslav in #30
UDP chat by @Szaroslav in #31
Add production environment variable to hide info and success logs by @Szaroslav in #32
Client: Fix EOF bug by @Szaroslav in #33
Server: Fix invalid client ID, which is sent in a message by @Szaroslav in #34
Add example multimedia file by @Szaroslav in #35
Documentation: Create "Running the applications" paragraph by @Szaroslav in #36

Full Changelog: v1.0...v2.0