Predict cache in Redis, need some cleanup

[vporton]

Fixes #2.

[vporton]

I discovered for myself that ft() stands for "full-text" and removed the unnecessary ft. I tested (using tracing) that the functionality is still there: the values are successfully retrieved from the cache (as it also was before this fix).

[vporton]

question about the reason for async methods on synch calls such as 'waiting for user input'.

Because I call e.g. Redis async methods in them directly or indirectly.