Update index.md
Update index.md
Add non-linked Beacon Bits stub page
Merge pull request #17 from contexthub/beaconbits

Add non-linked Beacon Bits stub page
Update w/ Beacon Bits copy and images
Merge pull request #18 from contexthub/beaconbits

Update w/ Beacon Bits copy and images
Add getting started, application services, push, vault, and event services documentation.
Merge branch 'master' into android-sdk-docs