Updated the article about web performance rendering measurement
Updated broken link in datachannel example according to @samdutton's patch
Fixed :host css according to @ebidel's cb299f7 patch
Sync code in O.o() with sample code at cf9fc92
Fix typo in customelements as 0b7e3b4
Merge pull request #1149 from axemclion/master

Updated the article about web performance rendering measurement
Forgot to add article update date.
Merge pull request #1162 from pearlchen/devtools-async-stacks-update

Forgot to add article update date.
Automatically updating the calendar
Updated 'Async Call Stack' according to 3c6cd43
Rough translation of Object.observe() article
Changes for Japanese localisation file
Automatically updating the calendar
Updated custom element according to bb77383
Replaced shadow DOM combinator with new spec's, according to #1044 and ca40567
Also fixed header.html in shadowdom-201
Automatically updating the calendar
Reviewed and fixed Japanese translation for O.o()
Merge pull request #1165 from agektmr/observe_ja

Japanese translation for Object.observe() article
Updated whole articles in webcomponents. e.g. shadowdom combinator, ...