change Tk into Tkx
table with scrollbar
validate configuration entry
using Tkx::update()
remove Tk
delete AppBaseTk, TextUndo_patch, Text_patch, WinComainuTk
modify Makefile.in and wincomainu.pl.in
add Encode::JP
Merge remote branch 'origin/tkx' into 0.7

Conflicts:
	Makefile.in
chmod AppBase and WinComainu
remove dictionary and auxiliary symbol feature