Liferay IDE and SDK dev guide update and tutorial conversions

Hi Rich,

This pull request has a few different things in it. I usually try to keep dev guide and dev site things separate, but these changes came to me like this and it's too difficult to divide them now. But they've been QA'd and I've reviewed them. The only new content is the instructions Nick added on working from behind a proxy; this is added to the dev guide. So you may want to do a quick review of that.

Here are the associated tickets ...

 // proxy content for dev guide and updates to the dev guide based on Greg's responses to IDE users.
https://issues.liferay.com/browse/1016

// converted into tutorials
https://issues.liferay.com/browse/1027
https://issues.liferay.com/browse/1028
https://issues.liferay.com/browse/1029
https://issues.liferay.com/browse/1030

Thanks,
Jim