Show file position in percentages.
Disable undo information for VLFI buffers.
Add regex search forward functionality.
Add regex search forward functionality.
Merge branch 'search' of https://github.com/m00natic/vlfi into search

Conflicts:
	vlfi.el
Fix small issues with forward search and add report progress.
Add backward whole file search.
Add direct jumps to first and last chunks.
Remove clutter form file name indicators.
Keep stable cursor position when moving through chunks.
Enhance search to cover in between chunk boundaries.
Simplify key-bindings.
Improve correctness of search forward.
Tweaks and fixes to searching.
Update README.
More key-binding simplification.
Add procedure to insert strictly batch sized chunk (if possible).
Refactor and simplify search procedures.  Always use batch sized
chunks.
Interactive change of batch size immediately updates content.
Optimize search a bit.