Starting Terrain class

Extended description once finalized
Initialize Water and Light

Will probably change sd to 25.
Protected int, alt initialize, sd => 25

Not sure if we need protected data fields but did that.  Will need get
methods.  Add alternate initialization with preset values you provide.
Set min and max  of 0-100 for light and water. -46 to 42 degrees Celsius
for the temp.

I Also changed sd to 25.  Gives more room to work with.
Add get and change

getLight, getWater, getTemp
changeLight, changeWater,changeTemp
Final change for now

protected data fields, getLight () newLight (int num)
two constructors Terrain () - random Terrain (int light, int water, int
temp)
random values , gaussian distribution
min = 0; max = 100; mean = 50; sd = 25; 68/97 between 25 - 50 ;
Merge worked. 2 colons had to be replaced with semicolons, Ready to comit to master