Merge pull request #46 from JerrySievert/master

update dependency versions

Merge pull request #44 from dukex/multidelete

enable delete multiple keys behavior, this closes #35

Merge pull request #43 from hyojin/master

add a message when database is opened

update readme

change atom-shell to electron

Merge pull request #42 from kmyl/kmyl-patch-1

BUG: Avoid the confusion between windows system path and URL adresses, due to colons.

various tweaks putting the UI together

creates the layout for the settings UI

use native dialogs

creates custom icns file

fixes #38 and fixes #39