Proofread and clean up the readme

[NikolayRys]

• Logo
• Comments: https://github.com/NikolayRys/Likely/pull/162/files

[vitkarpov]

@NikolayRys What's up the logo?

[NikolayRys]

Oh, not much, this is more a note for myself.

The current logo was sort-of a draft, I have a proper one now that I'll put into the repo.

[NikolayRys]

Document how to update counters on existing widget:
likely.initiate({forceUpdate:true});