Update ruby to latest version.

.travis.yml

@@ -8,7 +8,7 @@ branches:
   only:
     - 'master'
 rvm:
-  - 1.9.3-p327
+  - 1.9.3-p392
 services:
   - mysql
   - postgresql

doc/install/installation.md

@@ -74,8 +74,8 @@ Make sure you have the right version of Python installed.
 Download and compile it:
 
     mkdir /tmp/ruby && cd /tmp/ruby
-    curl --progress http://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.3-p327.tar.gz | tar xz
-    cd ruby-1.9.3-p327
+    curl --progress http://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.3-p392.tar.gz | tar xz
+    cd ruby-1.9.3-p392
     ./configure
     make
     sudo make install

doc/raketasks/maintenance.md

@@ -15,7 +15,7 @@ System:         Debian 6.0.6
 Current User:   gitlab
 Using RVM:      yes
 RVM Version:    1.17.2
-Ruby Version:   ruby-1.9.3-p327
+Ruby Version:   ruby-1.9.3-p392
 Gem Version:    1.8.24
 Bundler Version:1.2.3
 Rake Version:   10.0.1