added files for FAST-Simulink interface
added files for FAST-Simulink interface

git-svn-id: https://windsvn2.nrel.gov/FAST/branches/BJonkman@870 10acb478-4768-415a-8850-bacdb5912d4d

Former-commit-id: 5668f39f6e12097e426aca948e1572ea0d040bdf
OpenFAST/OpenFAST,OpenFAST/OpenFAST,OpenFAST/OpenFAST