Removed RVM from the README.

RVM has repeatedly refused to consider explicit requests not to interfere
with the Rubinius build process. Further, it has repeatedly broken support
for installing Rubinius. There is no reason to promote its use. There are
a number of other tools for installing and using Rubinius, as well as package
mannagers for every major OS distribution. Efforts to make these tools work
well with Rubinius or get packages for major OS distributions is a far better
use of time and effort.

Ultimately, we need a dedicated section in the Rubinius documentation to
explain the various ways in which Rubinius can be installed.

README

@@ -9,7 +9,7 @@ same standard libraries as Matz's Ruby implementation (MRI). Rubinius also
 provides C-API compatibility for native C extensions.
 
 Rubinius currently is compatible with Ruby version 1.8.7. Full support for Ruby
-version 1.9.3 is coming soon.
+version 1.9.3 is in progress.
 
 Rubinius runs on Mac OS X and many Unix/Linux operating systems. Support for
 Microsoft Windows is coming soon.
@@ -35,44 +35,18 @@ To install Rubinius, use the following steps:
 When the install process finishes, follow the directions printed to the
 terminal to add the Rubinius executable (bin) directory to your PATH.
 
-See Section 6. Language Modes below for more information about configuring
+See Section 5. Language Modes below for more information about configuring
 Rubinius for different Ruby language versions.
 
 
-4. Installing Rubinius with RVM
-
-Rubinius can be installed using the Ruby Version Manager (RVM) project.
-
-To install Rubinius with RVM, use the following steps:
-
-  1. Ensure the latest RVM is installed
-  2. rvm install rbx
-
-To use Rubinius in the current shell session, run:
-
-  rvm use rbx
-
-To make Rubinius the default interpreter in new shells, run:
-
-  rvm use rbx --default
-
-The documentation for RVM is available at:
-
-  https://rvm.io
-
-See Section 6. Language Modes below for more information about the supported
-Ruby language versions. See the RVM documentation for how to install Rubinius
-with different language modes using RVM.
-
-
-5. Using RubyGems
+4. Using RubyGems
 
 Rubinius comes with RubyGems built-in. To install a gem, run the following:
 
   rbx -S gem install <gem_name>
 
 
-6. Language Modes
+5. Language Modes
 
 Rubinius implements multiple Ruby language features in one executable. You can
 select the language mode at runtime by passing the -X18, -X19, or -X20 command
@@ -88,27 +62,27 @@ enabled and which one is the default mode with configure options.
 For example, to enable both 1.9 and 2.0 modes, with 1.9 the default, use the
 follwing configure options:
 
-./configure --enable-version=1.9,2.0 --default-version=1.9
+  ./configure --enable-version=1.9,2.0 --default-version=1.9
 
 The --enable-version option takes a comma-separated list of versions. The
 --default-version option takes a single version. If only a single version is
 enabled, setting the default version is redundant.
 
 
-7. Documentation
+6. Documentation
 
 After installing Rubinius, run 'rbx docs' to access the built-in documentation
 at any time.
 
 
-8. Tickets
+7. Tickets
 
 Please file tickets for bugs or problems. The issue tracker is:
 
   http://github.com/rubinius/rubinius/issues
 
 
-9. Contributing
+8. Contributing
 
 The Rubinius team welcomes contributions. For more information read the
 CONTRIBUTING file in the root directory of Rubinius.