* Added Keys for Home, Account, Itinerary, Log-Out, Contact, and the
Log-In instruction field in uimap.properties.

* Added XPath for the error field in the account creation page, for the
user, e-mail, password, verify password fields, and for the create
account button.

* Added Keys for account successfully created message, destination
message in the Index page, invalid user error, invalid password error,
invalid e-mail error, password mismatch in the create account page, for
the create account instruction message, for the login instruction
message, and for the destination input message in the Index page.

* Added the TopBar helper class containing a method for clicking the
Log-Out button.

* Added a method in the LoginPageHelper to verify the static instruction
message found on the Login page.

* LoginPageTests: added 8 scenarios, comments.

* Added an IndexPageHelper class containing helpers for the Index page.

* Created CreateAccountPageTests class, added test cases and comments.