Updated First two documentation topics written.

Added total and repeat percentages with or without delay.
Added total and repeat durations with or without delay.
Added percentages test into the test/tests.
Fixed repeat, endDelay methods now updating the total duration times.
Fixed update and poll triggering before finish one more time for last UI updates.
Small bug fixes

0.1.3 Release

Overtimer now reachable from window (window.Overtimer).
Added bower and yarn related files.