Update documentation

BUILD.md

@@ -25,65 +25,22 @@ make install
 # Build 32-bit and 64-bit executables and tarballs
 make release
 
-# Build executables and tarballs for Linux using Docker
-make linux
+# Make release archives for all supported platforms
+make release-all
 ```
 
 ### Using `go get`
 
 Alternatively, you can build fzf directly with `go get` command without
-cloning the repository.
+manually cloning the repository.
 
 ```sh
 go get -u github.com/junegunn/fzf/src/fzf
 ```
 
-Build options
--------------
-
-### With ncurses 6
-
-The official binaries of fzf are built with ncurses 5 because it's widely
-supported by different platforms. However ncurses 5 is old and has a number of
-limitations.
-
-1. Does not support more than 256 color pairs (See [357][357])
-2. Does not support italics
-3. Does not support 24-bit color
-
-[357]: https://github.com/junegunn/fzf/issues/357
-
-But you can manually build fzf with ncurses 6 to overcome some of these
-limitations. ncurses 6 supports up to 32767 color pairs (1), and supports
-italics (2). To build fzf with ncurses 6, you have to install it first. On
-macOS, you can use Homebrew to install it.
-
-```sh
-brew install homebrew/dupes/ncurses
-LDFLAGS="-L/usr/local/opt/ncurses/lib" make install
-```
-
-### With tcell
-
-[tcell][tcell] is a portable alternative to ncurses and we currently use it to
-build Windows binaries. tcell has many benefits but most importantly, it
-supports 24-bit colors. To build fzf with tcell:
-
-```sh
-TAGS=tcell make install
-```
-
-However, note that tcell has its own issues.
-
-- Poor rendering performance compared to ncurses
-- Does not support bracketed-paste mode
-- Does not support italics unlike ncurses 6
-- Some wide characters are not correctly displayed
-
 Third-party libraries used
 --------------------------
 
-- [ncurses][ncurses]
 - [mattn/go-runewidth](https://github.com/mattn/go-runewidth)
     - Licensed under [MIT](http://mattn.mit-license.org)
 - [mattn/go-shellwords](https://github.com/mattn/go-shellwords)
@@ -97,10 +54,3 @@ License
 -------
 
 [MIT](LICENSE)
-
-[install]: https://github.com/junegunn/fzf#installation
-[go]:      https://golang.org/
-[gil]:     http://en.wikipedia.org/wiki/Global_Interpreter_Lock
-[ncurses]: https://www.gnu.org/software/ncurses/
-[req]:     http://golang.org/doc/install
-[tcell]:   https://github.com/gdamore/tcell