major cleanup of ModelData, no longer store rates and amounts in the same array, renamed things to consistent convention

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/develop@1156 c0027639-9190-0b57-01eb-f09a03790dae
fix method name

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/develop@1157 c0027639-9190-0b57-01eb-f09a03790dae
ran Linux tests

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/develop@1158 c0027639-9190-0b57-01eb-f09a03790dae