Add help button - fixes #1
Add option to show addresses. Closes #3
Move "about" after "help" in action bar
Make "show addresses" the default

Why not?
Add Play Store link to Readme
Add `values-he` directory

Some devices apparently use “he” instead of “iw”. See
http://stackoverflow.com/a/8470980/560722
Merge pull request #6 from szh/master

Fix issues #1 and #3, plus add Play Store link to Readme