Fix root initializer documentation

[mhenrixon]

Removed the on load stuff since there is no autoloading in AMS anymore.

[coveralls]

Coverage increased (+0.05%) when pulling dcc4f27 on mhenrixon:patch-1 into 74d19e7 on rails-api:master.

[arthurnn]

I am concern about changing the docs right now, as master is not released yet. Could that be a problem? Could people get confused and try to use the instructions from the README using version 0.8 ?
@spastorino thoughts?

[spastorino]

Hmmm yes, you're right. Maybe we can add a README-0.8.md file and a comment in CAPS SAYING IF YOU'RE USING 0.8 GO HERE, THIS IS THE README OF MASTER, NEXT 0.9. Or could be even the other way around, I mean let's add README-master.md and point to that file from the 0.8 version. Whatever :)

[mhenrixon]

I've had this problem before and I believe that http://savonrb.com/ handles it very nicely but it takes some more work of course. Not sure the changes between versions will ever be major enough to call for completely separate docs?

Otherwise a version number note might be a good idea. Also!!! I would strongly recommend a gem specification .post_install_message about removing the autoload stuff in the initializer just to make sure that when the next version is released and people update they get notified they also need to change their documentation.

I did the post_install_message thing on https://github.com/inossidabile/wash_out for a breaking change between versions.