Updated RR to be C++ 03 standards compliant.
replaced enums with c++03 standard enums
use Poco TLS for NLEQ model storage
So, we can now compile and run with clang on OSX using the gcc 4.2 c++stdlib

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/develop@1315 c0027639-9190-0b57-01eb-f09a03790dae