Vendor redis_rb from Rubygems, not GitHub

Also just include the entire gem. Space used is negligible and this
way we don't have to think about what to leave in/out.

Create a vendor-gem script in Ruby instead of Make.

.gitignore

@@ -10,3 +10,4 @@ tags
 .bundle/
 custom_hooks
 hooks/*.d
+/*.gem

lib/vendor/redis/.gitignore

@@ -0,0 +1,16 @@
+*.rdb
+*.swp
+Gemfile.lock
+*.gem
+/tmp/
+/.idea
+/.yardoc
+/coverage/*
+/doc/
+/examples/sentinel/sentinel.conf
+/nohup.out
+/pkg/*
+/rdsrv
+/redis/*
+/test/db
+/test/test.conf

lib/vendor/redis/.travis.yml

@@ -0,0 +1,65 @@
+language: ruby
+
+rvm:
+  - 1.8.7
+  - 1.9.3
+  - 2.0
+  - 2.1
+  - 2.2
+  - 2.3.0
+  - jruby-18mode
+  - jruby-19mode
+  - jruby-9.0.5.0
+  - rbx-2
+
+gemfile: ".travis/Gemfile"
+
+sudo: false
+
+env:
+  global:
+    - VERBOSE=true
+    - TIMEOUT=1
+  matrix:
+    - conn=ruby      REDIS_BRANCH=2.8
+    - conn=hiredis   REDIS_BRANCH=2.8
+    - conn=synchrony REDIS_BRANCH=2.8
+    - conn=ruby      REDIS_BRANCH=unstable
+
+branches:
+  only:
+    - master
+
+matrix:
+  exclude:
+    # hiredis
+    - rvm: jruby-18mode
+      gemfile: .travis/Gemfile
+      env: conn=hiredis REDIS_BRANCH=2.8
+    - rvm: jruby-19mode
+      gemfile: .travis/Gemfile
+      env: conn=hiredis REDIS_BRANCH=2.8
+    - rvm: jruby-9.0.5.0
+      gemfile: .travis/Gemfile
+      env: conn=hiredis REDIS_BRANCH=2.8
+
+    # synchrony
+    - rvm: 1.8.7
+      gemfile: .travis/Gemfile
+      env: conn=synchrony REDIS_BRANCH=2.8
+    - rvm: jruby-18mode
+      gemfile: .travis/Gemfile
+      env: conn=synchrony REDIS_BRANCH=2.8
+    - rvm: jruby-19mode
+      gemfile: .travis/Gemfile
+      env: conn=synchrony REDIS_BRANCH=2.8
+    - rvm: jruby-9.0.5.0
+      gemfile: .travis/Gemfile
+      env: conn=synchrony REDIS_BRANCH=2.8
+  allow_failures:
+    - rvm: rbx-2
+
+notifications:
+  irc:
+    - irc.freenode.net#redis-rb
+  email: false

lib/vendor/redis/.travis/Gemfile

@@ -0,0 +1,11 @@
+source "https://rubygems.org"
+
+gemspec :path => "../"
+
+case ENV["conn"]
+when "hiredis"
+  gem "hiredis"
+when "synchrony"
+  gem "hiredis"
+  gem "em-synchrony"
+end

lib/vendor/redis/.yardopts

@@ -0,0 +1,3 @@
+--exclude redis/connection
+--exclude redis/compat
+--markup markdown