Merge branch 'release/v1.5.2' into develop
Merge branch 'hotfix/v1.5.3' into develop
Merge branch 'hotfix/v1.5.4' into develop
Switch contact email

This will make it easier when we transfer the app to UW in the Play
Store. It will potentially cause a conflict with the MultiRegion
branch, as this email shouldn't be hardcoded in the MultiRegion branch.
Remove/update download links

GitHub has deprecated downloads, so we'll move the debug keystore into
the repo itself. Also, update the links to point to the new repo
location.
Switch to previous/working problem APIs

Despite being documented, the old endpoints don't work. These do.

We're going to change the documentation so that it documents the
working APIs.
Move Preferences, update a string

Move preferences up a level.
Change "email the developer" to "contact us" because it's no longer
going to email the developer anymore.
Fixes #48

We can use our better warning mechanism to display this error.
Fix bug with refreshing stale data

This was why we weren't displaying "old" data when we failed to get new
data.
Fixes #45

This refreshes the data immediately on resume, and displays the
standard "out-of-date" warning. The warning will be cleared on next
good refresh.
Fixes #47, other refactoring and fixes

Included in this:
1. Refactoring goHome into another NavHelp class to begin supporting
better Up mode.
2. Fix some errors/warnings in TripInfoActivity that came up with the
new ADT.
Fixes #46

This fixes this issue in a bit of a convoluted way. I still need to
test it on older OSes where fragments aren't supported. But it doesn't
really *break* any functionality that users might have been relying on,
and it enables one big one.
Bump version, update what's new
Merge branch 'release/v1.5.5'