Blog post about New File Wizard

scala-ide/docs#104 should be merged before this blog post is merged because it references it.

I couldn't get jekyll to work on my system, thus I don't know yet how the content looks like. May you want to find it out for me? ;)

Any suggestions about improvements?

Btw, I enabled comments, they can be useful here.
That link is dead. Should it come in another PR?