README update

[andriyun]

Common issue to keep readme file updated
Follow up for #4 (comment)
#20 (comment)

After merging PR #22 we have a lot of changes in theme development flow.
So it quite important to update README files.

[pabloguerino]

Seems like we have nothing to update from that issue at this point

[andriyun]

There is common issue for each PR or Issue

[andriyun]

After merging PR #22 we have a lot of changes in theme development flow.
So it quite important to update README files.