PushRingsOut() works! actual gameplay now!

- finally basic gameplay achieved that keeps looping. Damn off-by-1
logics errors, jeez.
- reorganized various readme pics into a History folder, single readme
pic now.
- using commit amend with edited readme markdown. going to try rebasing
next since already pushed. second attempt.
Merge branch 'master' of https://github.com/nastajus/CircularTetris

Conflict resolved manually already:
	README.md