Fix TrueCps and Click Tracking issues

Tracking duration was being ignored, and extra timeouts were being
created every time the settings were saved.
Fixed True CPS tracking for large numbers
Added Season Timer and Helper

Added select box to Helper settings to auto-buy season upgrades.
Added check box to Timer settings to add a Season timer.
Timer label may now be either a function, to allow for dynamic labels.
Fixed simulation bug with Century egg

Century egg was causing problems for simulateBuy.  We'll now check to
make sure an increased bonus from the Century egg doesn't interfere with
the simulation.
Added comments
Removed spurious uses of parseInt

This fixes the max chain reward calculation for large values (fixes #83)
Merge pull request #109 from super-aardvark/truecps

Fix TrueCps and Click Tracking issues
Merge pull request #110 from super-aardvark/seasons

Added Season Timer and Helper
Merge pull request #111 from super-aardvark/simulation-fix

Fixed simulation bug with Century egg
Merge pull request #112 from super-aardvark/parseInt-fix

Removed spurious uses of parseInt
fix formatTime, bump version, append changelog