Add Jenkins Build Status Script

Adds a script to retrieve jenkins last completed build status for
$JOBNAME, returns 💚 for pass and 💔 for failure.

```
scripts/jenkins.rb jobname
```

Requires enviornment variable set for JENKINS_HOST

```
export JENKINS_HOST=https://ci.mycompany.net
```

tmux/scripts/jenkins.rb

@@ -0,0 +1,20 @@
+#!/usr/bin/env ruby
+# Encoding: utf-8
+
+require 'httparty'
+require 'json'
+
+host = ENV.fetch("JENKINS_HOST")
+job = ARGV.fetch(0, nil)
+fail 'No job name provided' unless job
+
+url = "#{host}/job/#{job}/lastSuccessfulBuild/api/json"
+
+response = HTTParty.get(url)
+parsed_response = JSON.parse(response.body, symbolize_names: true)
+
+if parsed_response.fetch(:result) == "SUCCESS"
+  puts "💚"
+else
+  puts "💔"
+end

tmux/tmux.conf.symlink

@@ -10,7 +10,7 @@ source ~/.powerline/powerline/bindings/tmux/powerline.conf
 set -g prefix C-a
 unbind C-b
 
-# Send C-a to undelyinng application by pressing it twice
+# Send C-a to underlying application by pressing it twice
 bind C-a send-prefix
 
 # Split vertically with |
@@ -60,9 +60,6 @@ set -g status-justify left
 set -g status-left-length 40
 set -g status-left '#[fg=colour231, bg=colour31, bold] #S #[fg=colour31, bg=black]'
 
-# show build status hostname, date, and time in status bar
-set -g status-right-length 100
-
 # color status bar
  set -g status-bg colour235
  set -g status-fg white