Add properties.
Add enterNewPasscodeString and implement properties in methods.
Use enterOldPasscodeString when changing passcode. String variables initialized if not given custom value.
Write briefs for new string variables.
Replace final static string with respective variable.
Remove _setupStrings, move to _loadDefaults.
Merge pull request #57 from neerajbaid/master

Customize strings that appear when entering, changing, etc. passcode.