Sticky Nav Fix for mobile

fixed scrolling issue for mobile version of nav
Merge pull request #30 from contexthub/paul-docs-updates

Sticky Nav Fix for mobile
sticky nav bug

code fix
Stubbing Push Notification generic doc page

Was “Coming soon” before.
Added link to REST API.
Fixed links.
Merge pull request #32 from contexthub/paul-docs-updates

sticky nav bug
Merge branch 'master' into near-devices