Implement the md5 view

[mindscratch]

The app has a route for getting a file containing the md5 file used by RVM and it should be implemented.

Without it sometimes (maybe most or all of the time) RVM will not trust the download unless you include the "--verify-downloads 1" option, such as rvm install ruby-2.1.1 --verify-downloads 1.

[stevenhaddox]

@mindscratch I've been hitting these issues too. Did you have a PR you can send for this? I'm not familiar with how to add MD5 support into this off-hand (though I've had that goal all along, hence constantly updating MD5 hashes in the config/rubies.yml.example).

Thanks!

[stevenhaddox]

This view should be downloaded as part of the installation script and written to <rvm_root>/user/md5

The format should be like:

https://rvm_io.global.ssl.fastly.net/binaries/centos/6/x86_64/ruby-2.1.5.tar.bz2=accd60a83aa2b116fab0dc8585cee0b0
http://cache.ruby-lang.org/pub/ruby/2.2/ruby-2.2.1.tar.bz2=06973777736d8e6bdad8dcaa469a9da3
http://production.cf.rubygems.org/rubygems/rubygems-2.4.6.tgz=5909df4829e5350ca431644322ea9e89