c++11: Fill in several documentation link TODOs

c++11: Fill in several documentation link TODOs

Fill in documentation links for automatic types, nullptr, range-for,
variadic templates, constexpr, raw strings, rvalue references, and
user-defined literals. All links are to the relevant section of
cppreference.com.

R=thakis@chromium.org

Committed: https://crrev.com/42d144cb98cd0f8fb4433e37305de1d3025d75f6
Cr-Commit-Position: refs/heads/master@{#343776}

[Nico, 2015-08-17 23:33:09]

lgtm

thanks!

[dhsharp, 2015-08-17 23:45:14]

The CQ bit was checked by dhsharp@chromium.org

[commit-bot: I haz the power, 2015-08-17 23:46:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1296373002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1296373002/1

[commit-bot: I haz the power, 2015-08-18 00:00:22]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-18 00:01:09]

Patchset 1 (id:??) landed as
https://crrev.com/42d144cb98cd0f8fb4433e37305de1d3025d75f6
Cr-Commit-Position: refs/heads/master@{#343776}