Add Arabic Numerals Option

Bumps the SDK to 6.1.0
Adds the option to switch between Roman and Arabic numerals

Fix NULL heart rate issue

v1.2.4

Bug fixes for Heart Rate and first run issues

#3 Address first install bug
#4 Address heart rate stall bug

Weather and status update bugfix

v1.2.1

Security and performance updates

v1.2.0

Security updates

Fix API Key import

v1.1.1

Fix API Key import

v1.1.0 Updates to display

This release contains updates to the goals display and the always-on display.

v1.0.0 Approved for the Fitbit Gallery

Update README.md