Update footer.
Generate footer content from js.
Tweak style.
Change footer content.
Generate menu from js.
refine document
refine document
update images and fix layouts in "Get Started" section
del an unused pic
update content in "Get Started" section
Tweak style.
Fix indent.
update images on "Devices and Displays" page
update images on "Theme" page
Fix menu generation bug on dir default page.
Merge remote-tracking branch 'origin/master'
Update building-blocks images.
Delete useless image.
Format js.
Change footer content.
Move Google Plus +1 button.