Revert "Refontify buffer when creating new region"

This reverts commit 611505909722425fe0259cae393be55028d499e9.

Not sure what I was fixing here, but probably a side-effect of some other bug.
Buffer refontifies fine now, all by itself.
Fix the timer error: "Selecting deleted buffer"
* mmm-fontify-region: Save and restore submode, overlay and local vars

This function is called from different positions, so just calling
`mmm-update-submode-region' at the end is not enough.
Merge pull request #17 from dgutov/retro

A few fixes for some my old commits