Reenable telemetry.
Rework transition to closed to match other transitions.

Fixes #178
Higher defaults for max_fs/fr. Fixes aspect ratio.

Fixes #246
Fix virtual overloading.
Make it clear that we don't intend to return here.

Fixes #250
Make this an actual constant in PeerConnectionImpl compilation unit.

Fixes #251
Use standard "friend" syntax.

Fixes #256
Hopefully unbust B2G JB.
Remote candidates might not be paired yet.

Fixes #247
Mark the pcand as paired, just in case.
Merge pull request #259 from docfaraday/fix_ice_component_assert

Fix ice component assert
Merge pull request #257 from docfaraday/fix_friend_bustage

Use standard "friend" syntax.
Merge pull request #255 from docfaraday/fix_win32_array_bustage

Make this an actual constant in PeerConnectionImpl compilation unit.
Merge pull request #254 from docfaraday/fix_no_return

Make it clear that we don't intend to return here.
Merge pull request #253 from docfaraday/fix_overloaded_virtual

Fix virtual overloading.
Merge pull request #252 from docfaraday/fix_aspect_ratio

Higher defaults for max_fs/fr. Fixes aspect ratio.
Merge pull request #216 from docfaraday/fix_telemetry

Reenable telemetry.
Put back a check.
Merge pull request #217 from docfaraday/signaling_closed

Rework transition to closed to match other transitions.