feat(homepage): resolves #174

[ppolariss]

resolves #174

[HydrogenC]

Since the new API /holes/_homepage is parallel to /holes, I would be better that they use the same parameter format.
I propose the following changes to keep the interface consistent between /holes/_homepage and /holes:

• Rename param offset to start_time
• Rename param size to length

Doing so would help simplify the client-code as we would only have to modify the URL.

[w568w]

Any progress?

[SeleiXi]

LGTM