bug fix (hidden property doesn't let table cell reload)
履歴ボタンのサイズ修正、数値によって大きくなるように
(ボタンの背景修正必要)履歴ボタンドラッグを同じデザインに
add
fix contradiction
Revert "fix contradiction"

This reverts commit 427f76da4ef6de14094d869baf714d33ff1aeca7.
modosu
Merge branch 'master' into iroiro

Conflicts:
	Calculator/CalcViewController.m
Merge pull request #25 from cfiken/iroiro

fix conflict