Update README.md
Fixed toString() so it doesn't strip zeroes from numbers like 10 and 100 by mistake.
Merge pull request #3 from darkphoenixff4/master

Fixed toString() so it doesn't strip zeroes from numbers like 10 and 100...
README.md was updated.
Several tests were added for the Decimal class to ensure the toString method is working properly. Left trimming of zeros was also added to the Decimal toString method.