Sepia takes a parameter for amount
Calculate the B component of Sepia calculations
Ensure sepia calculation argument in valid within 0 to 1
Update tests for sepia calculation
Update readme for sepia adjustment
Sepia adjustment takes a float32 in the range 0.0 to 1.0
Update readme with Sepia instructions
Update readme with Sepia instructions
Merge pull request #4 from nixterrimus/sepia

Sepia takes a parameter for amount