Runtime permissions fix

The v1.8.7 release broken because of API23 (Android 6.0) changes.

v1.8.8 adds basic runtime permissions checking and requests.

Removed the leaderboard

This release drops the leaderboard and associated Firefox Accounts preferences.

Patch for API17 guards

This applies a fix to put guards around APIs which are only available in API17 of Android.

v1.8.5

This fixes a crash related to the leaderboard server not responding as well as some visual styling.

Thanks to @cascheberg for both fixes!

Prerelease of the final Leaderboard Build

This fixes a number of UI regressions since upgrading to SDK 23.

Misc bugfixes to the 1.8 branch

Merge pull request #1767 from crankycoder/features/bug-1763

Features/bug 1763

v1.8.2

bumped to 1.8.2

1.8.0 release

Whee! A new release! Finally!

This build includes a new leaderboard, FxA integration and we also gather some extra fields when stumbling including GPS speed, GPS heading, air pressure if it's available on your device and the age of the wifi data collection with respect to the last known GPS reading.

TLS hotfix

This is a patch over the v1.7.12 release which fixes some TLS security issues.

Mozilla Stumbler v1.7.12

This release is to fix a concurrency crash in drawing the observation points.

Additional contributions from:
@cascheberg fixed wifi-only dots display on map
@stripTM updated Spanish translation