Fix issues with step detector not tracking + history

Enhanced History to have a spinner navigation to pick week, month,
total to pick from.
This included adding 2 spinner items. Added HistorySpinnerAdapter to do
a drop down look and a custom title.

Added back StepDetector and switch to this if for some reason things
get all crazy.
Add iOS Art
Add opacity to warning
Bump Version
Merge pull request #8 from jamesmontemagno/master

Latest fixes and art additions