Add fin https://github.com/fisherman/fin.

fin is a pure fish, node version manager for fish-shell.

README.markdown

@@ -9,9 +9,12 @@ Note: `nvm` does not support Windows (see [#284](https://github.com/creationix/n
  - [nodist](https://github.com/marcelklehr/nodist)
 
 Note: `nvm` does not support [Fish] either (see [#303](https://github.com/creationix/nvm/issues/303)). Alternatives exist, which are neither supported nor developed by us:
- - [nvm](https://github.com/derekstavis/plugin-nvm) plugin for [Oh My Fish](https://github.com/oh-my-fish/oh-my-fish), which makes nvm and its completions available in fish shell
  - [bass](https://github.com/edc/bass) allows to use utilities written for Bash in fish shell
  - [fast-nvm-fish](https://github.com/brigand/fast-nvm-fish) only works with version numbers (not aliases) but doesn't significantly slow your shell startup
+ - [fin](https://github.com/fisherman/fin) is a pure fish node version manager for fish shell
+ - [nvm](https://github.com/derekstavis/plugin-nvm) plugin for [Oh My Fish](https://github.com/oh-my-fish/oh-my-fish), which makes nvm and its completions available in fish shell
+ 
+
 
 Note: We still have some problems with FreeBSD, because there is no pre-built binary from official for FreeBSD, and building from source may need [patches](https://www.freshports.org/www/node/files/patch-deps_v8_src_base_platform_platform-posix.cc), see the issue ticket:
  - [[#900] [Bug] nodejs on FreeBSD need to be patched ](https://github.com/creationix/nvm/issues/900)