Add Wi-Fi Access Points scanning option

Adding Wi-Fi Access Points scanning in setting for enhancement on #241
Revert "Add Wi-Fi Access Points scanning option"

This reverts commit 51a10b79a3a02cd309eeb3d6e5784453b99550cf.
Don't scan when Wi-Fi turned off
Don't scan when Wi-Fi turned off
Merge branch 'master' of https://github.com/xsoh/MozStumbler
Merge pull request #248 from xsoh/master

Add Wi-Fi Access Points scanning option