Fix typo in man page
Text and HTML output formats for documentation

Add two new Makefile targets `doc-txt' and `doc-html' for generating
text and HTML versions of the man pages respectively.

Requires mdocml http://mdocml.bsd.lv/
Fix wording
Update .gitignore
Document -gtb option
Game->Close menu only closes the current tab instead of the whole window
Update manual page
Qt5 bugfix: players' clocks wouldn't display correctly.
Send PGN tags from PgnGame to PgnTagsModel
Improved PGN import dialog

Adds progress bar and remaining import time.
Add human readable time presentation
Move highlighting in MoveList

When the user selects a move by clicking on it in the move list or by
viewing it with the game viewer's controls, the move is highlighted with
white text and black background.
Fix performance problem in MoveList

MoveList::selectMove() was so slow that it would slow everything down
when the moves where browsed quickly (eg. by using the game viewer
controls).
Bump up cutechess-cli version number
Update README.md

cutechess-cli 0.6.0 was released.
Remaining time estimation for threaded tasks
Don't allow duplicate engine names in configuration

It's not pretty - to be cleaned up later...
Always use PgnGame::setTag() to set or remove a tag

Now all tag changes are sent to PgnTagsModel.
Simplify some status messages
Remove useless comment