[ANN] RubyInstaller 2.2.2

[Justin Baker]

I'm very pleased to announce the release of RubyInstaller packages for
Ruby 2.2.2

Installers and 7z binary packages are available from bintray.com:

http://rubyinstaller.org/downloads

https://bintray.com/oneclick/rubyinstaller/rubyinstaller/2.2.2

## Ruby 2.2.2

Packages will be provided in two versions:
32bits (x86) and 64bits (x64).

The DevKit used for version the Ruby 2.0 series is required for this version.

### Important information

Please note that the installers in this release are *not digitally signed*.

You can read more about this in post at RubyInstaller group:
https://groups.google.com/d/topic/rubyinstaller/NhAqcepQ-Xw/discussion

#### Choosing 32bits vs 64bits

Before you download a 64bits version (labeled x64), it is important
you understand that not all gems, libraries or tools have been tested
for this version.

Things are pretty close, however it is still our recommendation you
use a 32bit release.

If you have a 64bits version of Windows, you can still use 32bits, as
there is no performance issue around it.

#### Ruby 2.2.x is brand new

While officially 2.2.x is stable, that doesn't mean all the software
will magically work on it.

There were breaking bugs in 2.2.1 which didn't allow gems to be cross-compiled.
So many gems will not yet have fat binaries for Ruby 2.2.2. This
situation is expected to get better soon.

Use 2.2.2 for development and verify your application, scripts and
tools works properly before deciding to run this in your production
environment.

#### Existing pre-compiled gems might not be Ruby 2.2 compatible

Ruby 2.2 introduced some C API changes which means compiled C
extensions with previous versions of Ruby may not run against Ruby
2.2.

**DO NOT install Ruby 2.2 on top of existing Ruby 2.1.x or earlier**,
or try to use compiled extensions with it.

You will be required to force compilation of those gems:

gem install <name> --platform=ruby

This **will require you have the extra dependencies installed** for
that gem to compile. Look at the gem documentation for the
requirements.

Please check each gem documentation and recent releases.

#### Do not use other DevKit version than the one recommended

This version of Ruby has been compiled and optimized for mingw-w64 GCC 4.7.2.

Use of another version of DevKit package to compile gems might result
in compilation issues during gem installation or simply segfaults.

Look for the DevKit installers identified with the name
'DevKit-mingw64-32' and 'DevKit-mingw64-64' for 32 and 64 bits
respectively.

To be clear:

* Download and install `DevKit-mingw64-32-4.7.2` for 32bits Ruby
* Download and install `DevKit-mingw64-64-4.7.2` for 64bits Ruby

**Known Issues**

There are some issues with Development Kit configuration process that fails
to detect x64 installations of Ruby. You will need to manually edit
`config.yml` for it to work. See the following issues for details:

- https://github.com/oneclick/rubyinstaller/issues/221
- https://github.com/oneclick/rubyinstaller/pull/237

### MD5:
69ac5e5e9d687c35989393bf6e7b15f9 *ruby-2.2.2-doc-chm.7z
ee0d7604eb267dd086a0401c4314d5f7 *ruby-2.2.2-i386-mingw32.7z
f36b211f97a2421154667d7af6f0ef40 *ruby-2.2.2-x64-mingw32.7z
bd8675404063cf814e38579fd53ac39f *rubyinstaller-2.2.2-x64.exe
b730da8dda79107681f88423c2b6926d *rubyinstaller-2.2.2.exe

### SHA256
82866bd5881ec48b0e83cc37ac5ff374b044aff977c38de3a190151f9d31a476
*ruby-2.2.2-doc-chm.7z
5831bb35208cd0004a25675863d04a9da89ffa53d0f393cbbb794776b33d43bd
*ruby-2.2.2-i386-mingw32.7z
5db1f9af028fd5e60e5056b2bac85ca6f46d7755eb56a9c04b1dd854947b417c
*ruby-2.2.2-x64-mingw32.7z
25cbd5cb02d4c1b73d8386ee123c68d61aafa6c879fc6230a51016278fae3950
*rubyinstaller-2.2.2-x64.exe
53c04fd0d60a640ae868ff917b284da7c0131be8242d7953b69829a011abfd5c
*rubyinstaller-2.2.2.exe

### Official Announcement:
* https://www.ruby-lang.org/en/news/2015/04/13/ruby-2-2-2-released/

### Enhancements:
* Upgraded Ruby 2.2 to 2.2.2