Formatted README.md, from Nicolas CARPi.

.github/README.md

@@ -0,0 +1,81 @@
+# Welcome to tmux!
+
+tmux is a terminal multiplexer: it enables a number of terminals to be created,
+accessed, and controlled from a single screen. tmux may be detached from a
+screen and continue running in the background, then later reattached.
+
+This release runs on OpenBSD, FreeBSD, NetBSD, Linux, OS X and Solaris.
+
+## Dependencies
+
+tmux depends on [libevent](https://libevent.org) 2.x, avaailable from [this
+page](https://github.com/libevent/libevent/releases/latest).
+
+It also depends on [ncurses](https://www.gnu.org/software/ncurses/), available from [this page](https://invisible-mirror.net/archives/ncurses/).
+
+## Installation
+
+### From release tarball
+
+To build and install tmux from a release tarball, use:
+
+~~~bash
+./configure && make
+sudo make install
+~~~
+
+tmux can use the utempter library to update utmp(5), if it is installed - run
+configure with `--enable-utempter` to enable this.
+
+### From version control
+
+To get and build the latest from version control:
+
+~~~bash
+git clone https://github.com/tmux/tmux.git
+cd tmux
+sh autogen.sh
+./configure && make
+~~~
+
+(Note that this requires at least a working C compiler, make, autoconf,
+automake, pkg-config as well as libevent and ncurses libraries and headers.)
+
+## Contributing
+
+Bug reports, feature suggestions and especially code contributions are most
+welcome. Please send by email to:
+
+tmux-users@googlegroups.com
+
+Or open a GitHub issue or pull request.
+
+Please read the CONTRIBUTING file before opening an issue.
+
+## Documentation
+
+For documentation on using tmux, see the tmux.1 manpage. View it from the
+source tree with:
+
+~~~bash
+nroff -mdoc tmux.1|less
+~~~
+
+A small example configuration is in `example_tmux.conf`.
+
+And a bash(1) completion file at:
+
+https://github.com/imomaliev/tmux-bash-completion
+
+For debugging, run tmux with -v or -vv to generate server and client log files
+in the current directory.
+
+## Support
+
+The tmux mailing list for general discussion and bug reports is:
+
+https://groups.google.com/forum/#!forum/tmux-users
+
+Subscribe by sending an email to:
+
+tmux-users+subscribe@googlegroups.com