Timer does not support stop/start or inc/dec time [1/1]

[Problem]
The timer does not support stopping and starting the timer time or increasing/decreasing the reset time at a student
    entry granularity.
Most of the time units are in seconds, which is not consistent with much of the java FWK, which is in MS.

[Solution]
Add support for stop/start and inc/dec of the timer.
Change time unit to be in MS instead of seconds within the application.
Add padding to count down and reset numbers [1/1]

[Problem]
The count down and reset numbers are squashed together.

[Solution]
Add a android:paddingRight to give the numbers some breathing room.
Student entry flash red when low on time [1/1]

[Problem]
There is no indication that the count down is running out of time.

[Solution]
Have the student entry flash red when the timer is less than 30 seconds.
Merge branch 'feedback'

Adding features from user feedback that were developed off the main branch.