Updated rbenv role

Using latest versions of rbenv, bundler, rake, and rubygems.

playbooks/roles/rbenv/defaults/main.yml

 ---
 
-rbenv_version: 'v0.4.0'
-rbenv_bundler_version: '1.3.2'
-rbenv_rake_version: '10.0.3'
+rbenv_version: 'v1.0.0'
+rbenv_bundler_version: '1.11.2'
+rbenv_rake_version: '10.4.2'
 rbenv_root: "{{ rbenv_dir }}/.rbenv"
 rbenv_gem_root: "{{ rbenv_dir }}/.gem"
 rbenv_gem_bin: "{{ rbenv_gem_root }}/bin"

playbooks/roles/rbenv/tasks/main.yml

@@ -177,6 +177,14 @@
   tags:
     - install
     - install:base
+
+- name: update rubygems
+  shell: "gem install rubygems-update && update_rubygems"
+  sudo_user: "{{ rbenv_user }}"
+  environment: "{{ rbenv_environment }}"
+  tags:
+    - install
+    - install:base
     
 - name: rehash
   shell: "rbenv rehash"
@@ -184,4 +192,4 @@
   environment: "{{ rbenv_environment }}"
   tags:
     - install
-    - install:base
\ No newline at end of file
+    - install:base