Save entry from paulp/scala-faq

Copy-paste the source of
https://github.com/paulp/scala-faq/wiki/Initialization-Order
together with the template of:
https://raw.github.com/scala/scala.github.com/master/tutorials/FAQ/finding-implicits.md

No other changes in this commit.
Fix sectioning
State problem more explicitly

I feel this is the required editing to make the point explicit.
Merge pull request #270 from Blaisorblade/patch-1

Save FAQ entry from paulp/scala-faq on abstract value troubles