Fix some HTML tags (found by Runningaway)

Signed-off-by: nppangband <nppangbanddev@verizon.net>
Change spell dialog to QButtonGroup instead of signal mapper.

Signed-off-by: nppangband <nppangbanddev@verizon.net>
Merge branch 'diego' of https://github.com/nppangband/NPPAngband_QT.git into Jeff
Add knowledge dialog box to display notes file.

Signed-off-by: nppangband <nppangbanddev@verizon.net>
Rename cmd3 to cmd_traps and cmd4 to cmd_misc.

Signed-off-by: nppangband <nppangbanddev@verizon.net>
Makefile was missing knowledge.cpp and knowledge.h

Signed-off-by: nppangband <nppangbanddev@verizon.net>
Add monster kill count knowledge screen.

Signed-off-by: nppangband <nppangbanddev@verizon.net>