Change tolerance from 10E-7 to 10E-3 for coordinates in mm
Debug two unit tests where transformations set manually were not correct
Small improvements in javadoc
Merge pull request #57 from mukoki/master

I fixed EPSGTransform and UserDefinedTransform.
For FrenchGridsTest, transformation using blegg grids works fine but the one supposed to use NTv2 grid don't use it. Needs to investigate which parameter is supposed to tell the factory to use NTv2 grid.