Re-enabled disabled pages

It have been disabled by markdown problem. It's working by just
renaming in my local environment.

Fixes #244.
Merge pull request #375 from xeno-by/master

#372 fixes inter-page links in the quasiquote guide
Merge pull request #363 from tkawachi/enable

Re-enabled disabled pages
Fix code highlighting.
Merge pull request #377 from lauris/patch-1

Fix code highlighting.
makes macro roadmap more explicit
mentions -Yfundep-materialization implemented in 2.10.5
updates the guides to include tentative plans for 2.12.x
every macro doc now explicitly mentions blackbox vs whitebox
emphasizes updates to pre-existing pages
restructures the page about type providers
Merge branch 'master' of github.com:scala/scala.github.com